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In epidemiology, an epidemic (frae Greek ἐπί epi "upon or abuin" an δῆμος demos "fowk") occurs when new cases o a certain disease, in a gien human population, an during a gien period, substantially exceed what is expectit based on recent experience.[1][2]

References[eedit | eedit soorce]

  1. Principles of Epidemiology, Third Edition (PDF). Atlanta, Georgia: Centers for Disease Control and Prevention. 2012.
  2. Green MS, Swartz T, Mayshar E, Lev B, Leventhal A, Slater PE, Shemer J (Januar 2002). "When is an epidemic an epidemic?" (PDF). Isr. Med. Assoc. J. 4 (1): 3–6. PMID 11802306. Archived (PDF) frae the original on 24 Julie 2012. Retrieved 4 September 2014.CS1 maint: multiple names: authors leet (link)