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Epidemie zeitlich und örtlich begrenzte Ausbreitung einer Infektion. Extremform: Pandemie,  wenn die ganze Welt betroffen ist, Beispiel: nH1N1 Influenza 
Endemie Andauerndes Auftreten von Infektionen in als Einzelfälle; Beispiel: FSME
Inzidenzrate (incidence rate) Anzahl neuauftretender Fälle pro Zeit (meist als: pro Jahr und pro 100.000 Personen) 
Prävalenz (prevalence) Anzahl zum Zeitpunkt bestehender Fälle  
Morbiditätsrate (morbidity rate) Anzahl neuauftretender Fälle einer bestimmten Krankheit pro Zeit (meist: pro Jahr X  100.000 Personen) 
Mortalitätsrate (mortality rate) Anzahl auftretender Todesfälle an einer bestimmten Krankheit pro Zeit (meist: pro  Jahr X 100.000 Personen); auch allgemein ohne Bezug als „Sterblichkeit“ (alle  Todesfälle pro Jahr X 100.000 Personen) 
Letalität (case fatality rate) Anteil (als Prozentsatz) der tödlich verlaufenden Fälle unter allen Fällen einer  bestimmten Erkrankung 
Created by: phoenix96



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