[Frequent incidence of epidemic hepatitis].
D006505:Hepatitis; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D014765:Viral Vaccines
D014765:Viral Vaccines
HEPATITIS, INFECTIOUS/epidemiology
Ueber gehäuftes Auftreten von Hepatitis epidemica.