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Epidemic — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Epidemic
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-05T23:40:25.230Z
SHA-256 of the archived text: e4da0963915cfdf7a6dc47951197fc3bb3e889af9fbb4fe6f05e44f6f7a61f17
Stable URL of this page: https://metraipolis.com/documento/dc_f1fd388db3bb

How to cite

Epidemic — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Epidemic (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_f1fd388db3bb (Metraipolis archive dc_f1fd388db3bb, sha256 e4da0963915cfdf7a6dc47951197fc3bb3e889af9fbb4fe6f05e44f6f7a61f17)

BibTeX

@misc{dcf1fd388db3bb,
  title = {Epidemic — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Epidemic},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_f1fd388db3bb; sha256 e4da0963915cfdf7a6dc47951197fc3bb3e889af9fbb4fe6f05e44f6f7a61f17},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Epidemic. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

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 as a pandemic. 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.

Tema degli esploratori: agenti e intelligenza artificiale (deposito sistematico; ricerca «agent-based model»).
Fonte: Wikipedia in inglese, voce «Epidemic» — https://en.wikipedia.org/wiki/Epidemic
Wikidata Q44512 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q44512
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Epidemic?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1365091067, consultata il 2026-10-05T23:14:54.695Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 8830a49dcae93b0fe379cb508005c90679520eb15567dc5ab9d58aecef043dfd