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photo credits: Wikimedia Commons
An epidemic (from Greek ἐπί epi "upon or above" and δῆμος demos "people") is the rapid spread of disease to a large number of hosts in a given population within a short period of time. For example, in meningococcal infections, an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered an epidemic.Epidemics of infectious disease are generally caused by several factors including a change in the ecology of the host population (e.g., increased stress or increase in the density of a vector species), a genetic change in the pathogen reservoir or the introduction of an emerging pathogen to a host population (by movement of pathogen or host). Generally, an epidemic occurs when host immunity to either an established pathogen or newly emerging novel pathogen is suddenly reduced below that found in the endemic equilibrium and the transmission threshold is exceeded.An epidemic may be restricted to one location; however, if it spreads to other countries or continents and affects a substantial number of people, it may be termed a pandemic.: §1:72 The declaration of an epidemic usually requires a good understanding of a baseline rate of incidence; epidemics for certain diseases, such as influenza, are defined as reaching some defined increase in incidence above this baseline. A few cases of a very rare disease may be classified as an epidemic, while many cases of a common disease (such as the common cold) would not. An epidemic can cause enormous damage through financial and economic losses in addition to impaired health and loss of life. Source: Wikipedia (en)
Works about epidemic 16
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La muerte rosa
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Epidemics: hate and compassion from the plague of Athens to AIDS
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Integrating Clinical Research into Epidemic Response: The Ebola Experience
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The Ebola Epidemic in West Africa: Proceedings of a Workshop
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Purificando las atmósferas epidémicas
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Tārīkh al-awbiʼah wa-al-majāʻāt bi-al-Maghrib fī al-qarnayn al-thāmin ʻashar wa-al-tāsiʻ ʻashar
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Plague in Sydney: The Anatomy of an Epidemic
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Uhura's Song
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Epidemic Disease in Fifteenth-Century England: The Medical Response and the Demographic Consequences
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The Horseman on the Roof
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The Plague
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Bílá nemoc
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Dracula
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The White Disease
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Mikroskopiske dræbere: En bog om epidemier
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Декабрь
Subject - wd:Q44512