146-563: The Lost Generation is the demographic cohort that reached early adulthood during World War I , and preceded the Greatest Generation . The social generation is generally defined as people born from 1883 to 1900, coming of age in either the 1900s or the 1910s, and were the first generation to mature in the 20th century . The term is also particularly used to refer to a group of American expatriate writers living in Paris during
292-468: A significant comparison, numbers must be altered for the size of the population that is under study. For example, the fertility rate is calculated as the ratio of the number of births to women of childbearing age to the total number of women in this age range. If these adjustments were not made, we would not know if a nation with a higher rate of births or deaths has a population with more women of childbearing age or more births per eligible woman. Within
438-436: A temperate bacteriophage called CTXφ . Microbiologists have studied the genetic mechanisms by which the V. cholerae bacteria turn off the production of some proteins and turn on the production of other proteins as they respond to the series of chemical environments they encounter, passing through the stomach, through the mucous layer of the small intestine, and on to the intestinal wall. Of particular interest have been
584-401: A country (or other entity) contains Population t persons at time t . What is the size of the population at time t + 1 ? Natural increase from time t to t + 1: Net migration from time t to t + 1: These basic equations can also be applied to subpopulations. For example, the population size of ethnic groups or nationalities within a given society or country is subject to
730-428: A day. Severe cholera, without treatment, kills about half of affected individuals. If the severe diarrhea is not treated, it can result in life-threatening dehydration and electrolyte imbalances. Estimates of the ratio of asymptomatic to symptomatic infections have ranged from 3 to 100. Cholera has been nicknamed the "blue death" because a person's skin may turn bluish-gray from extreme loss of fluids. Fever
876-838: A few years of childhood. By 1900, levels of illiteracy had fallen to less than 11% in the United States, around 3% in Great Britain, and only 1% in Germany. However, the problems of illiteracy and lack of school provision or attendance were felt more acutely in parts of Eastern and Southern Europe. Schools of this time period tended to emphasise strict discipline, expecting pupils to memorize information by rote. To help deal with teacher shortages, older students were often used to help supervise and educate their younger peers. Dividing children into classes based on age became more common as schools grew. However, whilst elementary schooling
1022-484: A field of sociology , though there are a number of independent demography departments. These methods have primarily been developed to study human populations, but are extended to a variety of areas where researchers want to know how populations of social actors can change across time through processes of birth, death, and migration . In the context of human biological populations, demographic analysis uses administrative records to develop an independent estimate of
1168-428: A greatly reduced pathogen count—though it will not necessarily be perfectly safe, it is an improvement for poor people with limited options. In Bangladesh this practice was found to decrease rates of cholera by nearly half. It involves folding a sari four to eight times. Between uses the cloth should be rinsed in clean water and dried in the sun to kill any bacteria on it. A nylon cloth appears to work as well but
1314-506: A home. Wealthier households also tended to include domestic servants, though their numbers would have varied from a single maid to a large team depending on how well-off the family was. Public concern for the welfare of children was intensifying by the later 19th century with laws being passed and societies formed to prevent their abuse. The state increasingly gained the legal right to intervene in private homes and family life to protect minors from harm. However, beating children for misbehaviour
1460-641: A lot of audience participation. A notable film industry had developed by the start of the First World War. The Lost Generation is best known as being the cohort that primarily fought in World War I. More than 70 million people were mobilized during the First World War, around 8.5 million of whom were killed and 21 million wounded in the conflict. About 2 million soldiers are believed to have been killed by disease, while individual battles sometimes caused hundreds of thousands of deaths. Around 60 million of
1606-697: A major catalyst for the rise of Nazism in Germany and the beginnings of its quest to establish dominance over the European continent, which would eventually lead to World War II in Europe . Additionally, the 1930s saw the less badly damaged Imperial Japan engage in its own empire-building, contributing to conflict in the Far East, where some scholars have argued the Second World War began as early as 1931. The 1930s saw rising popularity for radio, with
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#17327718801051752-534: A massive inoculation program in British India . Persons who survive an episode of cholera have long-lasting immunity for at least 3 years (the period tested.) A number of safe and effective oral vaccines for cholera are available. The World Health Organization (WHO) has three prequalified oral cholera vaccines (OCVs): Dukoral, Sanchol, and Euvichol. Dukoral , an orally administered, inactivated whole-cell vaccine , has an overall efficacy of about 52% during
1898-412: A new code of behaviour filled with more recklessness, party-going, and overt sexuality. The aftermath of the First World War saw substantive changes in the political situation, including a trend towards republicanism , the founding of many new relatively small nation-states which had previously been part of larger empires, and greater suffrage for groups such as the working class and women. France and
2044-460: A new product, and to analyze certain dynamics of a company's workforce. Choosing a new location for a branch of a bank, choosing the area in which to start a new supermarket, consulting a bank loan officer that a particular location would be a beneficial site to start a car wash, and determining what shopping area would be best to buy and be redeveloped in metropolis area are types of problems in which demographers can be called upon. Standardization
2190-541: A non-toxic B-subunit of cholera toxin and providing protection against V. cholerae O1; and two vaccines developed using the same transfer of technology—ShanChol (Shantha Biotec) and Euvichol (EuBiologics Co.), which have bivalent O1 and O139 oral killed cholera vaccines. Oral cholera vaccination could be deployed in a diverse range of situations from cholera-endemic areas and locations of humanitarian crises, but no clear consensus exists. Developed for use in Bangladesh ,
2336-408: A one-million fold increase in numbers of V. cholerae in the environment. The source of the contamination is typically other people with cholera when their untreated diarrheal discharge is allowed to get into waterways, groundwater or drinking water supplies. Drinking any contaminated water and eating any foods washed in the water, as well as shellfish living in the affected waterway , can cause
2482-498: A period of transition where in demography emerged from statistics as a separate field of interest. This period included a panoply of international 'great demographers' like Adolphe Quetelet (1796–1874), William Farr (1807–1883), Louis-Adolphe Bertillon (1821–1883) and his son Jacques (1851–1922), Joseph Körösi (1844–1906), Anders Nicolas Kaier (1838–1919), Richard Böckh (1824–1907), Émile Durkheim (1858–1917), Wilhelm Lexis (1837–1914), and Luigi Bodio (1840–1920) contributed to
2628-430: A person to contract an infection. Cholera is rarely spread directly from person to person . V. cholerae also exists outside the human body in natural water sources, either by itself or through interacting with phytoplankton , zooplankton , or biotic and abiotic detritus. Drinking such water can also result in the disease, even without prior contamination through fecal matter. Selective pressures exist however in
2774-530: A result of transmission by food, while in developing countries it is more often water. Food transmission can occur when people harvest seafood such as oysters in waters infected with sewage , as Vibrio cholerae accumulates in planktonic crustaceans and the oysters eat the zooplankton . People infected with cholera often have diarrhea, and disease transmission may occur if this highly liquid stool, colloquially referred to as "rice-water", contaminates water used by others. A single diarrheal event can cause
2920-421: A severe case if they become infected. Any individual, even a healthy adult in middle age, can undergo a severe case, and each person's case should be measured by the loss of fluids, preferably in consultation with a professional health care provider . The cystic fibrosis genetic mutation known as delta-F508 in humans has been said to maintain a selective heterozygous advantage : heterozygous carriers of
3066-426: A standardized mortality rate (SMR) or standardized incidence rate (SIR). Population change is analyzed by measuring the change between one population size to another. Global population continues to rise, which makes population change an essential component to demographics. This is calculated by taking one population size minus the population size in an earlier census . The best way of measuring population change
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#17327718801053212-499: A variety of demographic methods for modelling population processes. They include models of mortality (including the life table , Gompertz models , hazards models , Cox proportional hazards models , multiple decrement life tables , Brass relational logits), fertility (Hermes model, Coale -Trussell models, parity progression ratios ), marriage (Singulate Mean at Marriage, Page model), disability ( Sullivan's method , multistate life tables), population projections ( Lee-Carter model ,
3358-442: A year (uncertainty range: 21,000–143,000) as of 2015 . This occurs mainly in the developing world. In the early 1980s, death rates are believed to have still been higher than three million a year. It is difficult to calculate exact numbers of cases, as many go unreported due to concerns that an outbreak may have a negative impact on the tourism of a country. As of 2004, cholera remained both epidemic and endemic in many areas of
3504-555: A year. To date, seven cholera pandemics have occurred, with the most recent beginning in 1961, and continuing today. The illness is rare in high-income countries , and affects children most severely. Cholera occurs as both outbreaks and chronically in certain areas . Areas with an ongoing risk of disease include Africa and Southeast Asia . The risk of death among those affected is usually less than 5%, given improved treatment, but may be as high as 50% without such access to treatment. Descriptions of cholera are found as early as
3650-596: Is endemic . If people are immunized broadly, herd immunity results, with a decrease in the amount of contamination in the environment. WHO recommends that oral cholera vaccination be considered in areas where the disease is endemic (with seasonal peaks), as part of the response to outbreaks, or in a humanitarian crisis during which the risk of cholera is high. Oral Cholera Vaccine (OCV) has been recognized as an adjunct tool for prevention and control of cholera. The World Health Organization (WHO) has prequalified three bivalent cholera vaccines—Dukoral (SBL Vaccines), containing
3796-547: Is oral rehydration salts (ORS), the replacement of fluids and electrolytes by using slightly sweet and salty solutions. Rice-based solutions are preferred. In children, zinc supplementation has also been found to improve outcomes. In severe cases, intravenous fluids , such as Ringer's lactate , may be required, and antibiotics may be beneficial. The choice of antibiotic is aided by antibiotic sensitivity testing . Cholera continues to affect an estimated 3–5 million people worldwide and causes 28,800–130,000 deaths
3942-422: Is a common problem. Stool and swab samples collected in the acute stage of the disease, before antibiotics have been administered, are the most useful specimens for laboratory diagnosis. If an epidemic of cholera is suspected, the most common causative agent is V. cholerae O1. If V. cholerae serogroup O1 is not isolated, the laboratory should test for V. cholerae O139. However, if neither of these organisms
4088-503: Is a common source. Humans are the only known host for the bacteria . Risk factors for the disease include poor sanitation , insufficient clean drinking water , and poverty . Cholera can be diagnosed by a stool test , or a rapid dipstick test , although the dipstick test is less accurate. Prevention methods against cholera include improved sanitation and access to clean water . Cholera vaccines that are given by mouth provide reasonable protection for about six months, and confer
4234-459: Is a useful demographic technique used in the analysis of a business. It can be used as an interpretive and analytic tool for the comparison of different markets. These organizations have interests about the number and characteristics of their clients so they can maximize the sale of their products, their outlook on their influence, or the ends of their power, services, and beneficial works. Cholera Cholera ( / ˈ k ɒ l ər ə / )
4380-476: Is an infection of the small intestine by some strains of the bacterium Vibrio cholerae . Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea lasting a few days. Vomiting and muscle cramps may also occur. Diarrhea can be so severe that it leads within hours to severe dehydration and electrolyte imbalance . This may result in sunken eyes , cold skin, decreased skin elasticity, and wrinkling of
4526-442: Is available to determine the presence of V. cholerae . In those samples that test positive, further testing should be done to determine antibiotic resistance. In epidemic situations, a clinical diagnosis may be made by taking a patient history and doing a brief examination. Treatment via hydration and over-the-counter hydration solutions can be started without or before confirmation by laboratory analysis, especially where cholera
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4672-417: Is because developed countries have proportionally more older people, who are more likely to die in a given year, so that the overall mortality rate can be higher even if the mortality rate at any given age is lower. A more complete picture of mortality is given by a life table , which summarizes mortality separately at each age. A life table is necessary to give a good estimate of life expectancy. Suppose that
4818-446: Is effective for adults aged 18–64 as a single dose. One injectable vaccine was found to be effective for two to three years. The protective efficacy was 28% lower in children less than five years old. However, as of 2010 , it has limited availability. Work is under way to investigate the role of mass vaccination. The WHO recommends immunization of high-risk groups, such as children and people with HIV , in countries where this disease
4964-416: Is increasing within cholera bacteria. In Bangladesh , for example, most cases are resistant to tetracycline , trimethoprim-sulfamethoxazole , and erythromycin . Rapid diagnostic assay methods are available for the identification of multi-drug resistant cases. New generation antimicrobials have been discovered which are effective against cholera bacteria in in vitro studies. A rapid dipstick test
5110-424: Is isolated, it is necessary to send stool specimens to a reference laboratory. Infection with V. cholerae O139 should be reported and handled in the same manner as that caused by V. cholerae O1. The associated diarrheal illness should be referred to as cholera and must be reported in the United States. The World Health Organization (WHO) recommends focusing on prevention, preparedness, and response to combat
5256-460: Is less in those with lowered gastric acidity (for instance those using proton pump inhibitors ). Children are also more susceptible, with two- to four-year-olds having the highest rates of infection. Individuals' susceptibility to cholera is also affected by their blood type , with those with type O blood being the most susceptible. Persons with lowered immunity , such as persons with AIDS or malnourished children, are more likely to develop
5402-431: Is likely to continue to rise. Populations can change through three processes: fertility, mortality, and migration. Fertility involves the number of children that women have and is to be contrasted with fecundity (a woman's childbearing potential). Mortality is the study of the causes, consequences, and measurement of processes affecting death to members of the population. Demographers most commonly study mortality using
5548-754: Is maintained. The WHO only recommends antibiotics in those with severe dehydration. Doxycycline is typically used first line, although some strains of V. cholerae have shown resistance . Testing for resistance during an outbreak can help determine appropriate future choices. Other antibiotics proven to be effective include cotrimoxazole , erythromycin , tetracycline , chloramphenicol , and furazolidone . Fluoroquinolones , such as ciprofloxacin , also may be used, but resistance has been reported. Antibiotics improve outcomes in those who are both severely and not severely dehydrated. Azithromycin and tetracycline may work better than doxycycline or ciprofloxacin . In Bangladesh zinc supplementation reduced
5694-469: Is not as affordable. Continued eating speeds the recovery of normal intestinal function. The WHO recommends this generally for cases of diarrhea no matter what the underlying cause. A CDC training manual specifically for cholera states: "Continue to breastfeed your baby if the baby has watery diarrhea, even when traveling to get treatment. Adults and older children should continue to eat frequently." The most common error in caring for patients with cholera
5840-442: Is rapid and thready, and urine output decreases with time. Muscle cramping and weakness, altered consciousness, seizures , or even coma due to electrolyte imbalances are common, especially in children. Cholera bacteria have been found in shellfish and plankton . Transmission is usually through the fecal-oral route of contaminated food or water caused by poor sanitation . Most cholera cases in developed countries are
5986-412: Is rare and should raise suspicion for secondary infection. Patients can be lethargic and might have sunken eyes, dry mouth, cold clammy skin, or wrinkled hands and feet. Kussmaul breathing , a deep and labored breathing pattern, can occur because of acidosis from stool bicarbonate losses and lactic acidosis associated with poor perfusion . Blood pressure drops due to dehydration, peripheral pulse
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6132-406: Is rare. For example, the last major outbreak of cholera in the United States occurred in 1910–1911. Cholera is mainly a risk in developing countries in those areas where access to WASH (water, sanitation and hygiene) infrastructure is still inadequate. Effective sanitation practices, if instituted and adhered to in time, are usually sufficient to stop an epidemic. There are several points along
6278-401: Is said that the work of these writers was autobiographical based on their use of mythologized versions of their lives. One of the themes that commonly appear in the authors' works is decadence and the frivolous lifestyle of the wealthy. Both Hemingway and F. Scott Fitzgerald touched on this theme throughout the novels The Sun Also Rises and The Great Gatsby . Another theme commonly found in
6424-550: Is seen as the intellectual father of ideas of overpopulation and the limits to growth. Later, more sophisticated and realistic models were presented by Benjamin Gompertz and Verhulst . In 1855, a Belgian scholar Achille Guillard defined demography as the natural and social history of human species or the mathematical knowledge of populations, of their general changes, and of their physical, civil, intellectual, and moral condition. The period 1860–1910 can be characterized as
6570-473: Is the statistical study of human populations : their size, composition (e.g., ethnic group, age), and how they change through the interplay of fertility (births), mortality (deaths), and migration. Demographic analysis examines and measures the dimensions and dynamics of populations; it can cover whole societies or groups defined by criteria such as education , nationality , religion , and ethnicity . Educational institutions usually treat demography as
6716-554: Is the case in much of the developing world, and most of historical demography . One of these techniques in contemporary demography is the sister method, where survey researchers ask women how many of their sisters have died or had children and at what age. With these surveys, researchers can then indirectly estimate birth or death rates for the entire population. Other indirect methods in contemporary demography include asking people about siblings, parents, and children. Other indirect methods are necessary in historical demography. There are
6862-586: Is the preferred solution, often with added potassium. Large volumes and continued replacement until diarrhea has subsided may be needed. Ten percent of a person's body weight in fluid may need to be given in the first two to four hours. This method was first tried on a mass scale during the Bangladesh Liberation War , and was found to have much success. Despite widespread beliefs, fruit juices and commercial fizzy drinks like cola are not ideal for rehydration of people with serious infections of
7008-404: Is to underestimate the speed and volume of fluids required. In most cases, cholera can be successfully treated with oral rehydration therapy (ORT), which is highly effective, safe, and simple to administer. Rice-based solutions are preferred to glucose-based ones due to greater efficiency. In severe cases with significant dehydration, intravenous rehydration may be necessary. Ringer's lactate
7154-432: Is today widely taught in many universities across the world, attracting students with initial training in social sciences, statistics or health studies. Being at the crossroads of several disciplines such as sociology , economics , epidemiology , geography , anthropology and history , demography offers tools to approach a large range of population issues by combining a more technical quantitative approach that represents
7300-510: Is used in a wide variety of contexts. For example, it is often used in business plans, to describe the population connected to the geographic location of the business. Demographic analysis is usually abbreviated as DA. For the 2010 U.S. Census, The U.S. Census Bureau has expanded its DA categories. Also as part of the 2010 U.S. Census, DA now also includes comparative analysis between independent housing estimates, and census address lists at different key time points. Patient demographics form
7446-421: Is using the intercensal percentage change. The intercensal percentage change is the absolute change in population between the censuses divided by the population size in the earlier census. Next, multiply this a hundredfold to receive a percentage . When this statistic is achieved, the population growth between two or more nations that differ in size, can be accurately measured and examined. For there to be
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#17327718801057592-449: The Gs alpha subunit of the heterotrimeric G protein . This results in constitutive cAMP production, which in turn leads to the secretion of water, sodium, potassium, and bicarbonate into the lumen of the small intestine and rapid dehydration. The gene encoding the cholera toxin was introduced into V. cholerae by horizontal gene transfer . Virulent strains of V. cholerae carry a variant of
7738-744: The International Union for the Scientific Study of Population , or a national association such as the Population Association of America in the United States, or affiliates of the Federation of Canadian Demographers in Canada . Population composition is the description of population defined by characteristics such as age, race , sex or marital status . These descriptions can be necessary for understanding
7884-666: The Leslie Matrix ), and population momentum ( Keyfitz ). The United Kingdom has a series of four national birth cohort studies, the first three spaced apart by 12 years: the 1946 National Survey of Health and Development , the 1958 National Child Development Study , the 1970 British Cohort Study , and the Millennium Cohort Study , begun much more recently in 2000. These have followed the lives of samples of people (typically beginning with around 17,000 in each study) for many years, and are still continuing. As
8030-516: The Middle Ages , Christian thinkers devoted much time in refuting the Classical ideas on demography. Important contributors to the field were William of Conches , Bartholomew of Lucca , William of Auvergne , William of Pagula , and Muslim sociologists like Ibn Khaldun . One of the earliest demographic studies in the modern period was Natural and Political Observations Made upon
8176-542: The Roaring Twenties . When the Lost Generation was growing up, the ideal family arrangement was generally seen as the man of the house being the breadwinner and primary authority figure whilst his wife dedicated herself to caring for the home and children. Most, even less well-off, married couples attempted to conform to this ideal. It was common for family members of three different generations to share
8322-519: The Spanish flu pandemic, which was unusual in the sense that it killed many younger adults of the same Lost Generation age group that had mainly died in the war. Later, especially in major cities, much of the 1920s is considered to have been a more prosperous period when the Lost Generation, in particular, escaped the suffering and turmoil they had lived through by rebelling against the social and cultural norms of their elders. This more optimistic period
8468-572: The United States and much of Europe ), registry statistics are the best method for estimating the number of births and deaths. A census is the other common direct method of collecting demographic data. A census is usually conducted by a national government and attempts to enumerate every person in a country. In contrast to vital statistics data, which are typically collected continuously and summarized on an annual basis, censuses typically occur only every 10 years or so, and thus are not usually
8614-406: The human stomach . The few surviving bacteria conserve their energy and stored nutrients during the passage through the stomach by shutting down protein production. When the surviving bacteria exit the stomach and reach the small intestine , they must propel themselves through the thick mucus that lines the small intestine to reach the intestinal walls where they can attach and thrive. Once
8760-666: The life table , a statistical device that provides information about the mortality conditions (most notably the life expectancy) in the population. Migration refers to the movement of persons from a locality of origin to a destination place across some predefined, political boundary. Migration researchers do not designate movements 'migrations' unless they are somewhat permanent. Thus, demographers do not consider tourists and travellers to be migrating. While demographers who study migration typically do so through census data on place of residence, indirect sources of data including tax forms and labour force surveys are also important. Demography
8906-479: The potassium level may be normal, even though large losses have occurred. As the dehydration is corrected, potassium levels may decrease rapidly, and thus need to be replaced. This is best done by Oral Rehydration Solution (ORS). Antibiotic treatments for one to three days shorten the course of the disease and reduce the severity of the symptoms. Use of antibiotics also reduces fluid requirements. People will recover without them, however, if sufficient hydration
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#17327718801059052-433: The social dynamics from historical and comparative research. This data is often compared using a population pyramid . Population composition is also a very important part of historical research. Information ranging back hundreds of years is not always worthwhile, because the numbers of people for which data are available may not provide the information that is important (such as population size ). Lack of information on
9198-411: The "sari filter" is a simple and cost-effective appropriate technology method for reducing the contamination of drinking water. Used sari cloth is preferable but other types of used cloth can be used with some effect, though the effectiveness will vary significantly. Used cloth is more effective than new cloth, as the repeated washing reduces the space between the fibers. Water collected in this way has
9344-510: The 1920s. Gertrude Stein is credited with coining the term, and it was subsequently popularised by Ernest Hemingway , who used it in the epigraph for his 1926 novel The Sun Also Rises : "You are all a lost generation." "Lost" in this context refers to the "disoriented, wandering, directionless" spirit of many of the war's survivors in the early postwar period . In the wake of the Industrial Revolution , Western members of
9490-530: The 19th century, died in 2018. The final remaining veteran to have served in World War I in any capacity was Florence Green , who died in 2012, while Claude Choules , the last veteran to have been involved in combat, had died the previous year. However, these individuals were born in 1902 and 1901 respectively, putting them outside the usual birth years for the Lost Generation. In his memoir A Moveable Feast (1964), published after Hemingway's and Stein's deaths, Ernest Hemingway writes that Gertrude Stein heard
9636-512: The 5th century BC in Sanskrit . In Europe, cholera was a term initially used to describe any kind of gastroenteritis, and was not used for this disease until the early 19th century. The study of cholera in England by John Snow between 1849 and 1854 led to significant advances in the field of epidemiology because of his insights about transmission via contaminated water, and a map of the same
9782-751: The Application of Probabilities to Life Contingencies (1838). In 1755, Benjamin Franklin published his essay Observations Concerning the Increase of Mankind, Peopling of Countries, etc. , projecting exponential growth in British colonies . His work influenced Thomas Robert Malthus , who, writing at the end of the 18th century, feared that, if unchecked, population growth would tend to outstrip growth in food production, leading to ever-increasing famine and poverty (see Malthusian catastrophe ). Malthus
9928-564: The Bills of Mortality (1662) by John Graunt , which contains a primitive form of life table . Among the study's findings were that one-third of the children in London died before their sixteenth birthday. Mathematicians, such as Edmond Halley , developed the life table as the basis for life insurance mathematics. Richard Price was credited with the first textbook on life contingencies published in 1771, followed later by Augustus De Morgan , On
10074-611: The First World War out of a total United Kingdom population of 46 million including women, children, and men too old to bear arms. Additionally, nations recruited heavily from their colonial empires. Three million men from around the British Empire outside the United Kingdom served in the British Army as soldiers and laborers, whilst France recruited 475,000 soldiers from its colonies. Other nations involved include
10220-439: The First World War, while employment opportunities for unmarried women widened. This time period saw the development of a new type of young woman in popular culture known as a flapper, who was known for their rebellion against previous social norms. They had a physically distinctive appearance compared to their predecessors only a few years earlier, cutting their hair into bobs, wearing shorter dresses and more makeup, while taking on
10366-401: The First World War. Though there were slight differences between individual countries and from one year to the next, the average life expectancy in the developed world during the 1950s, 1960s and early 1970s was typically around seventy years old. However, some members of the Lost Generation outlived the norm by several decades. Nabi Tajima , the last surviving person known to have been born in
10512-511: The Lost Generation grew up in societies that were more literate, consumerist, and media-saturated than ever before, but which also tended to maintain strictly conservative social values. Young men of the cohort were mobilized on a mass scale for World War I, a conflict that was often seen as the defining moment of their age group's lifespan. Young women also contributed to and were affected by the war, and in its aftermath gained greater freedoms politically and in other areas of life. The Lost Generation
10658-474: The Lost Generation were somewhat less likely to die at a very early age than their parents and grandparents, but were significantly more likely to do so than children born even a few decades later. Laws restricting child labour in factories had begun to appear from around 1840 onwards and by the end of the 19th century, compulsory education had been introduced throughout much of the Western world for at least
10804-406: The United Kingdom both gained territory from their enemies, while the war and the damage it did to the European empires are generally considered major stepping stones in the United States' path to becoming the world's dominant superpower. The German and Italian populations' resentment against what they generally saw as a peace settlement that took too much away from the former or did not give enough to
10950-495: The United States which enlisted 4 million men during the conflict and the Ottoman Empire which mobilized 2,850,000 soldiers. Beyond the extent of the deaths, the war had a profound effect on many of its survivors, giving many young men severe mental health problems and crippling physical disabilities. The war also unsettled many soldiers' sense of reality, who had gone into the conflict with a belief that battle and hardship
11096-566: The added benefit of protecting against another type of diarrhea caused by E. coli . In 2017, the US Food and Drug Administration (FDA) approved a single-dose, live, oral cholera vaccine called Vaxchora for adults aged 18–64 who are travelling to an area of active cholera transmission. It offers limited protection to young children. People who survive an episode of cholera have long-lasting immunity for at least three years (the period tested). The primary treatment for affected individuals
11242-474: The aquatic environment that may reduce the virulence of V. cholerae . Specifically, animal models indicate that the transcriptional profile of the pathogen changes as it prepares to enter an aquatic environment. This transcriptional change results in a loss of ability of V. cholerae to be cultured on standard media, a phenotype referred to as ' viable but non-culturable ' (VBNC) or more conservatively ' active but non-culturable ' (ABNC). One study indicates that
11388-467: The basic demographic equation holds true by definition, in practice the recording and counting of events (births, deaths, immigration, emigration) and the enumeration of the total population size are subject to error. So allowance needs to be made for error in the underlying statistics when any accounting of population size or change is made. The figure in this section shows the latest (2004) UN ( United Nations ) WHO projections of world population out to
11534-696: The best source of data on births and deaths. Analyses are conducted after a census to estimate how much over or undercounting took place. These compare the sex ratios from the census data to those estimated from natural values and mortality data. Censuses do more than just count people. They typically collect information about families or households in addition to individual characteristics such as age, sex, marital status, literacy/education, employment status, and occupation, and geographical location. They may also collect data on migration (or place of birth or of previous residence), language, religion, nationality (or ethnicity or race), and citizenship. In countries in which
11680-518: The category of standardization , there are two major approaches: direct standardization and indirect standardization. A stable population does not necessarily remain fixed in size. It can be expanding or shrinking. The crude death rate as defined above and applied to a whole population can give a misleading impression. For example, the number of deaths per 1,000 people can be higher in developed nations than in less-developed countries, despite standards of health being better in developed countries. This
11826-422: The cholera bacteria reach the intestinal wall, they no longer need the flagella to move. The bacteria stop producing the protein flagellin to conserve energy and nutrients by changing the mix of proteins that they express in response to the changed chemical surroundings. On reaching the intestinal wall, V. cholerae start producing the toxic proteins that give the infected person a watery diarrhea. This carries
11972-612: The cholera transmission path at which its spread may be halted: Handwashing with soap or ash after using a toilet and before handling food or eating is also recommended for cholera prevention by WHO Africa. Surveillance and prompt reporting allow for containing cholera epidemics rapidly. Cholera exists as a seasonal disease in many endemic countries, occurring annually mostly during rainy seasons . Surveillance systems can provide early alerts to outbreaks, therefore leading to coordinated response and assist in preparation of preparedness plans. Efficient surveillance systems can also improve
12118-692: The conflict: 55% of male Italians and Bulgarians aged 18 to 50 were called to military service. Elsewhere the proportions were even higher: 63% of military-aged men in Serbia, 78% in Austro-Hungary, and 81% of military-aged men in France and Germany served. Britain, which traditionally relied primarily on the Royal Navy for its security, was a notable exception to this rule and did not introduce conscription until 1916. Around 5 million British men fought in
12264-553: The core of the data for any medical institution, such as patient and emergency contact information and patient medical record data. They allow for the identification of a patient and their categorization into categories for the purpose of statistical analysis. Patient demographics include: date of birth , gender , date of death , postal code, ethnicity, blood type , emergency contact information, family doctor, insurance provider data, allergies , major diagnoses and major medical history. Formal demography limits its object of study to
12410-498: The core of the discipline with many other methods borrowed from social or other sciences. Demographic research is conducted in universities, in research institutes, as well as in statistical departments and in several international agencies. Population institutions are part of the CICRED (International Committee for Coordination of Demographic Research) network while most individual scientists engaged in demographic research are members of
12556-457: The country of a future elite. Many felt that "the flower of youth and the best manhood of the peoples [had] been mowed down", for example, such notable casualties as the poets Isaac Rosenberg , Rupert Brooke , Edward Thomas , and Wilfred Owen , composer George Butterworth , and physicist Henry Moseley . Authors William Strauss and Neil Howe define the Lost Generation as the cohort born from 1883 to 1900, who came of age during World War I and
12702-424: The culturability of V. cholerae drops 90% within 24 hours of entering the water, and furthermore that this loss in culturability is associated with a loss in virulence. Both toxic and non-toxic strains exist. Non-toxic strains can acquire toxicity through a temperate bacteriophage . About 100 million bacteria must typically be ingested to cause cholera in a normal healthy adult. This dose, however,
12848-413: The decades after the conflict, but some significantly outlived the norm. The last surviving person who was known to have been born during the 19th century was Nabi Tajima , who died in 2018 at age 117, while the last man born during the 19th century was Jiroemon Kimura , who died in 2013 at age 116. Most members were parents of the Greatest Generation and Silent Generation . The first named generation,
12994-528: The development of demography and to the toolkit of methods and techniques of demographic analysis. Demography is the statistical and mathematical study of the size, composition, and spatial distribution of human populations and how these features change over time. Data are obtained from a census of the population and from registries: records of events like birth , deaths , migrations, marriages, divorces , diseases, and employment . To do this, there needs to be an understanding of how they are calculated and
13140-649: The distribution and abundance of organisms. As it relates to organizations and demography, organizations go through various liabilities to their continued survival. Hospitals, like all other large and complex organizations are impacted in the environment they work. For example, a study was done on the closure of acute care hospitals in Florida between a particular time. The study examined effect size, age, and niche density of these particular hospitals. A population theory says that organizational outcomes are mostly determined by environmental factors . Among several factors of
13286-433: The duration and severity of diarrhea in children with cholera when given with antibiotics and rehydration therapy as needed. It reduced the length of disease by eight hours and the amount of diarrhea stool by 10%. Supplementation appears to be also effective in both treating and preventing infectious diarrhea due to other causes among children in the developing world. If people with cholera are treated quickly and properly,
13432-400: The enlisted originated from the European continent, which saw its younger men mobilized on a mass scale. Most of Europe's great powers operated peacetime conscription systems where men were expected to do a brief period of military training in their youth before spending the rest of their lives in the army reserve. Nations with this system saw a huge portion of their manpower directly invested in
13578-408: The family. The causes of turnover can be split into two separate factors, one linked with the culture of the organization, and the other relating to all other factors. People who do not fully accept a culture might leave voluntarily. Or, some individuals might leave because they fail to fit in and fail to change within a particular organization. A basic definition of population ecology is a study of
13724-404: The final years of the 19th century, mortality in the first five years of childhood was plateauing at a little under one in every four births. At around one in three in 1800, the early childhood mortality rate had declined overall throughout the next hundred years but would fall most sharply during the first half of the 20th century, reaching less than one in twenty by 1950. This meant that members of
13870-489: The first to immunize humans against a bacterial disease. His vaccine and inoculation was rather controversial and was rejected by his peers and several investigation commissions but it ended up demonstrating its effectiveness and being recognized for it: out of the 30 thousand people he vaccinated only 54 died. Russian-Jewish bacteriologist Waldemar Haffkine also developed a human cholera vaccine in July 1892. He conducted
14016-480: The first year after being given and 62% in the second year, with minimal side effects. It is available in over 60 countries. However, it is not currently recommended by the Centers for Disease Control and Prevention (CDC) for most people traveling from the United States to endemic countries. The vaccine that the US Food and Drug Administration (FDA) recommends, Vaxchora , is an oral attenuated live vaccine , that
14162-407: The formative years of the Lost Generation gas lights and candles were still the most common form of lighting. Though statistics on child mortality dating back to the beginning of the Lost Generation's lifespan are limited, the Centers for Disease Control and Prevention report that in 1900 one in ten American infants died before their first birthday. Figures for the United Kingdom state that during
14308-477: The garage owner with one from Ecclesiastes ." A few lines later, recalling the risks and losses of the war, he adds: "I thought of Miss Stein and Sherwood Anderson and egotism and mental laziness versus discipline and I thought 'who is calling who a lost generation? ' " The writings of the Lost Generation literary figures often pertained to the writers' experiences in World War I and the years following it. It
14454-523: The general public. The latter part of the century not only saw rising popularity for magazines targeted specifically at young boys but the development of a relatively new genre aimed at girls. A significant milestone was reached in the development of cinema when, in 1895, projected moving images were first shown to a paying audience in Paris. Early films were very short (generally taking the form of newsreels, comedic sketches, and short documentaries). They lacked sound but were accompanied by music, lectures, and
14600-420: The genetic mechanisms by which cholera bacteria turn on the protein production of the toxins that interact with host cell mechanisms to pump chloride ions into the small intestine, creating an ionic pressure which prevents sodium ions from entering the cell. The chloride and sodium ions create a salt-water environment in the small intestines, which through osmosis can pull up to six liters of water per day through
14746-462: The genetic structure. Two clusters have been identified: Cluster I and Cluster II. For the most part, Cluster I consists of strains from the 1960s and 1970s, while Cluster II largely contains strains from the 1980s and 1990s, based on the change in the clone structure. This grouping of strains is best seen in the strains from the African continent. In many areas of the world, antibiotic resistance
14892-401: The hands and feet. Dehydration can cause the skin to turn bluish . Symptoms start two hours to five days after exposure. Cholera is caused by a number of types of Vibrio cholerae , with some types producing more severe disease than others. It is spread mostly by unsafe water and unsafe food that has been contaminated with human feces containing the bacteria. Undercooked shellfish
15038-466: The intestinal cells, creating the massive amounts of diarrhea. The host can become rapidly dehydrated unless treated properly. By inserting separate, successive sections of V. cholerae DNA into the DNA of other bacteria, such as E. coli that would not naturally produce the protein toxins, researchers have investigated the mechanisms by which V. cholerae responds to the changing chemical environments of
15184-400: The intestines, and their excessive sugar content may even harm water uptake. If commercially produced oral rehydration solutions are too expensive or difficult to obtain, solutions can be made. One such recipe calls for 1 liter of boiled water, 1/2 teaspoon of salt, 6 teaspoons of sugar, and added mashed banana for potassium and to improve taste. As there frequently is initially acidosis ,
15330-488: The latter fed into the fascist movements, which would eventually turn those countries into totalitarian dictatorships. For Russia, the years after its revolution in 1917 were plagued by disease, famine, terror, and civil war eventually concluded in the establishment of the Soviet Union. The immediate post-World War One period was characterized by continued political violence and economic instability. The late 1910s saw
15476-418: The measurement of population processes, while the broader field of social demography or population studies also analyses the relationships between economic, social, institutional, cultural, and biological processes influencing a population. Demographic thoughts traced back to antiquity, and were present in many civilisations and cultures, like Ancient Greece , Ancient Rome , China and India . Made up of
15622-505: The mortality rate is less than 1%; however, with untreated cholera, the mortality rate rises to 50–60%. For certain genetic strains of cholera, such as the one present during the 2010 epidemic in Haiti and the 2004 outbreak in India, death can occur within two hours of becoming ill. Cholera affects an estimated 2.8 million people worldwide, and causes approximately 95,000 deaths
15768-448: The multiplying new generations of V. cholerae bacteria out into the drinking water of the next host if proper sanitation measures are not in place. The cholera toxin (CTX or CT) is an oligomeric complex made up of six protein subunits : a single copy of the A subunit (part A), and five copies of the B subunit (part B), connected by a disulfide bond . The five B subunits form a five-membered ring that binds to GM1 gangliosides on
15914-400: The mutation (who are not affected by cystic fibrosis) are more resistant to V. cholerae infections. In this model, the genetic deficiency in the cystic fibrosis transmembrane conductance regulator channel proteins interferes with bacteria binding to the intestinal epithelium , thus reducing the effects of an infection. When consumed, most bacteria do not survive the acidic conditions of
16060-413: The nation will become a nation of immigrants. This influx is projected to rise over the next century as new immigrants and their children will account for over half the U.S. population. These demographic shifts could ignite major adjustments in the economy, more specifically, in labor markets. People decide to exit organizations for many reasons, such as, better jobs, dissatisfaction, and concerns within
16206-413: The older male population. Like in the First World War, women helped to make up for labour shortages caused by mass military recruitment by entering more traditionally masculine employment and entering the conflict more directly in female military branches and underground resistance movements . However, those in middle age were generally less likely to become involved in this kind of work than the young. This
16352-458: The original data-collection procedures may prevent accurate evaluation of data quality. The demographic analysis of labor markets can be used to show slow population growth, population aging , and the increased importance of immigration. The U.S. Census Bureau projects that in the next 100 years, the United States will face some dramatic demographic changes. The population is expected to grow more slowly and age more rapidly than ever before and
16498-412: The other pressures on them drove widows to alcoholism, depression, or suicide. Additionally, the large number of men killed in the First World War made it harder for many young women who were still single at the start of conflict to get married; this accelerated a trend towards them gaining greater independence and embarking on careers. Women's gaining of political rights sped up in the Western world after
16644-422: The phrase from a French garage owner who serviced Stein's car. When a young mechanic failed to repair the car quickly enough, the garage owner shouted at the young man, "You are all a ' génération perdue ' ." While telling Hemingway the story, Stein added: "That is what you are. That's what you all are ... all of you young people who served in the war. You are a lost generation." Hemingway thus credits
16790-761: The phrase to Stein, who was then his mentor and patron. The 1926 publication of Hemingway's The Sun Also Rises popularized the term; that novel serves to epitomize the post-war expatriate generation. However, Hemingway later wrote to his editor Max Perkins that the "point of the book" was not so much about a generation being lost, but that "the earth abideth forever". Hemingway believed the characters in The Sun Also Rises may have been "battered" but were not lost. Consistent with this ambivalence, Hemingway employs "Lost Generation" as one of two contrasting epigraphs for his novel. In A Moveable Feast , Hemingway writes, "I tried to balance Miss Stein's quotation from
16936-528: The population. Demographic analysis estimates are often considered a reliable standard for judging the accuracy of the census information gathered at any time. In the labor force , demographic analysis is used to estimate sizes and flows of populations of workers; in population ecology the focus is on the birth, death, migration and immigration of individuals in a population of living organisms, alternatively, in social human sciences could involve movement of firms and institutional forms. Demographic analysis
17082-516: The prefix demo- and the suffix -graphy , the term demography refers to the overall study of population. In ancient Greece, this can be found in the writings of Herodotus , Thucydides , Hippocrates , Epicurus , Protagoras , Polus , Plato and Aristotle . In Rome, writers and philosophers like Cicero , Seneca , Pliny the Elder , Marcus Aurelius , Epictetus , Cato , and Columella also expressed important ideas on this ground. In
17228-410: The preserve of boys from wealthier families, gaining mass appeal during the late Victorian and Edwardian period . Dolls often sold by street vendors at a low price were popular with girls. Teddy bears appeared for the first time in the early 1900s. Tin plated penny toys were also sold by street sellers for a single penny. The turn of the 20th century saw a surge in public park building in parts of
17374-566: The questions they answer which are included in these four concepts: population change , standardization of population numbers, the demographic bookkeeping equation, and population composition. There are two types of data collection —direct and indirect—with several methods of each type. Direct data comes from vital statistics registries that track all births and deaths as well as certain changes in legal status such as marriage, divorce, and migration (registration of place of residence). In developed countries with good registration systems (such as
17520-399: The risk assessment for potential cholera outbreaks. Understanding the seasonality and location of outbreaks provides guidance for improving cholera control activities for the most vulnerable. For prevention to be effective, it is important that cases be reported to national health authorities. Spanish physician Jaume Ferran i Clua developed the first successful cholera inoculation in 1885,
17666-417: The same sources of change. When dealing with ethnic groups, however, "net migration" might have to be subdivided into physical migration and ethnic reidentification ( assimilation ). Individuals who change their ethnic self-labels or whose ethnic classification in government statistics changes over time may be thought of as migrating or moving from one population subcategory to another. More generally, while
17812-447: The samples have been drawn in a nationally representative way, inferences can be drawn from these studies about the differences between four distinct generations of British people in terms of their health, education, attitudes, childbearing and employment patterns. Indirect standardization is used when a population is small enough that the number of events (births, deaths, etc.) are also small. In this case, methods must be used to produce
17958-468: The second time in their lifetime, and now often had to watch their sons go to the battlefield. The place of the older generation who had been young adults during World War I in the new conflict was a theme in popular media of the time period, with examples including Waterloo Bridge and Old Bill and Son . Civil defense organizations designed to provide a final line of resistance against invasion and assist in home defense more broadly recruited heavily from
18104-406: The spread of cholera. They also stress the importance of an effective surveillance system. Governments can play a role in all of these areas. Although cholera may be life-threatening, prevention of the disease is normally straightforward if proper sanitation practices are followed. In developed countries , due to their nearly universal advanced water treatment and sanitation practices, cholera
18250-646: The stomach, mucous layers, and intestinal wall. Researchers have discovered a complex cascade of regulatory proteins controls expression of V. cholerae virulence determinants. In responding to the chemical environment at the intestinal wall, the V. cholerae bacteria produce the TcpP/TcpH proteins, which, together with the ToxR/ToxS proteins, activate the expression of the ToxT regulatory protein. ToxT then directly activates expression of virulence genes that produce
18396-613: The surface of the intestinal epithelium cells. The A1 portion of the A subunit is an enzyme that ADP-ribosylates G proteins , while the A2 chain fits into the central pore of the B subunit ring. Upon binding, the complex is taken into the cell via receptor-mediated endocytosis . Once inside the cell, the disulfide bond is reduced, and the A1 subunit is freed to bind with a human partner protein called ADP-ribosylation factor 6 (Arf6). Binding exposes its active site, allowing it to permanently ribosylate
18542-547: The term "Lost Generation" is used for the young people who came of age around the time of World War I . In Europe, they are mostly known as the "Generation of 1914", for the year World War I began. In France, they were sometimes called the Génération du feu , the "(gun)fire generation". In the United Kingdom, the term was originally used for those who died in the war, and often implicitly referred to upper-class casualties who were perceived to have died disproportionately, robbing
18688-404: The theory, there are four that apply to the hospital closure example: size, age, density of niches in which organizations operate, and density of niches in which organizations are established. Problems in which demographers may be called upon to assist business organizations are when determining the best prospective location in an area of a branch store or service outlet, predicting the demand for
18834-410: The toxins, causing diarrhea in the infected person and allowing the bacteria to colonize the intestine. Current research aims at discovering "the signal that makes the cholera bacteria stop swimming and start to colonize (that is, adhere to the cells of) the small intestine." Amplified fragment length polymorphism fingerprinting of the pandemic isolates of V. cholerae has revealed variation in
18980-422: The vast majority of Western households having access to the medium by the end of the decade. Programming included soap operas, music, and sport. Educational broadcasts were frequently available. The airwaves also provided a source of news and, particularly for the era's autocratic regimes, an outlet for political propaganda . When World War II broke out in 1939, the Lost Generation faced a major global conflict for
19126-478: The vital registration system may be incomplete, the censuses are also used as a direct source of information about fertility and mortality; for example, the censuses of the People's Republic of China gather information on births and deaths that occurred in the 18 months immediately preceding the census. Indirect methods of collecting data are required in countries and periods where full data are not available, such as
19272-587: The war as soon as it concluded. The war also had a personal impact on the lives of female members of the Lost Generation. Many women lost their husbands in the conflict, which frequently meant losing the main breadwinner of the household. However, war widows often received a pension and financial assistance to support their children. Even with some economic support, raising a family alone was often financially difficult and emotionally draining, and women faced losing their pensions if they remarried or were accused of engaging in frowned-upon behavior. In some cases, grief and
19418-430: The war effort or to help those suffering due to it, such as the wounded or refugees. Often they were experiencing manual labor for the first time. However, this reshaping of the female role led to fears that the sexes having the same responsibilities would disrupt the fabric of society and that more competition for work would leave men unemployed and erode their pay. Most women had to exit the employment they had taken during
19564-428: The west to provide public space in rapidly growing industrial towns. They provided a means for children from different backgrounds to play and interact together, sometimes in specially designed facilities. They held frequent concerts and performances. Beginning around the middle of the 19th century, magazines of various types which had previously mainly targeted the few that could afford them found rising popularity among
19710-797: The works of these authors was the death of the American Dream , which is exhibited throughout many of their novels. It is particularly prominent in The Great Gatsby , in which the character Nick Carraway comes to realize the corruption that surrounds him. Notable figures of the Lost Generation include F. Scott Fitzgerald , Thomas Wolfe , Gertrude Stein , Ernest Hemingway , T. S. Eliot , Ezra Pound , Jean Rhys , Henry Strater , and Sylvia Beach . Demography Demography (from Ancient Greek δῆμος ( dêmos ) 'people, society' and -γραφία ( -graphía ) 'writing, drawing, description')
19856-451: The world. Recent major outbreaks are the 2010s Haiti cholera outbreak and the 2016–2022 Yemen cholera outbreak . In October 2016, an outbreak of cholera began in war-ravaged Yemen . WHO called it "the worst cholera outbreak in the world". In 2019, 93% of the reported 923,037 cholera cases were from Yemen (with 1911 deaths reported). Between September 2019 and September 2020, a global total of over 450,000 cases and over 900 deaths
20002-533: The year 2150 (red = high, orange = medium, green = low). The UN "medium" projection shows world population reaching an approximate equilibrium at 9 billion by 2075. Working independently, demographers at the International Institute for Applied Systems Analysis in Austria expect world population to peak at 9 billion by 2070. Throughout the 21st century, the average age of the population
20148-553: Was a path to redemption and greatness. When years of pain, suffering, and loss seemed to bring about little in the way of a better future, many were left with a profound sense of disillusionment. Though soldiers on the frontlines of the First World War were exclusively men, women contributed to the war effort in other ways. Many took the jobs men had left in previously male-dominated sectors such as heavy industry, while some even took on non-combat military roles. Many, particularly wealthier women, took part in voluntary work to contribute to
20294-519: Was also heavily vulnerable to the Spanish flu pandemic and became the driving force behind many cultural changes, particularly in major cities during what became known as the Roaring Twenties . Later in their midlife, they experienced the economic effects of the Great Depression and often saw their own sons leave for the battlefields of World War II . In the developed world, they tended to reach retirement and average life expectancy during
20440-494: Was becoming increasingly accessible for Western children at the turn of the century, secondary education was still much more of a luxury. Only 11% of American fourteen to seventeen-year-olds were enrolled at High School in 1900, a figure which had only marginally increased by 1910. Though the school leaving age was officially meant to be 14 by 1900, until the First World War, most British children could leave school through rules put in place by local authorities at 12 or 13 years old. It
20586-406: Was not only common but viewed as the duty of a responsible caregiver. Sewer systems designed to remove human waste from urban areas had become widespread in industrial cities by the late 19th century, helping to reduce the spread of diseases such as cholera . Legal standards for the quality of drinking water also began to be introduced. However, the introduction of electricity was slower, and during
20732-497: Was not uncommon at the end of the 19th century for Canadian children to leave school at nine or ten years old. By the 1890s, children's toys entered into mass production. In 1893, the British toy company William Britain revolutionized the production of toy soldiers by devising the method of hollow casting , making soldiers that were cheaper and lighter than their competitors. This led to metal toy soldiers, which had previously been
20878-466: Was particularly true of any kind of military involvement. In the West, the Lost Generation tended to reach the end of their working lives around the 1950s and 1960s. For those members of the cohort who had fought in World War I, their military service frequently was viewed as a defining moment in their lives even many years later. Retirement notices of this era often included information on a man's service in
21024-629: Was reported; however, the accuracy of these numbers suffer from over-reporting from countries that report suspected cases (and not laboratory confirmed cases), as well as under-reporting from countries that do not report official cases (such as Bangladesh, India and Philippines). Although much is known about the mechanisms behind the spread of cholera, researchers still do not have a full understanding of what makes cholera outbreaks happen in some places and not others. Lack of treatment of human feces and lack of treatment of drinking water greatly facilitate its spread. Bodies of water have been found to serve as
21170-406: Was short-lived, however, as 1929 saw the beginning of the Great Depression , which would continue throughout the 1930s and become the longest and most severe financial downturn ever experienced in Western industrialized history. Though it had begun in the United States, the crises led to sharp increases in worldwide unemployment, reductions in economic output and deflation . The depression was also
21316-440: Was the first recorded incidence of epidemiological tracking. The primary symptoms of cholera are profuse diarrhea and vomiting of clear fluid. These symptoms usually start suddenly, half a day to five days after ingestion of the bacteria. The diarrhea is frequently described as "rice water" in nature and may have a fishy odor. An untreated person with cholera may produce 10 to 20 litres (3 to 5 US gal) of diarrhea
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