The virus diseases as causes of sickness and death.
D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D009026:Mortality; D011024:Pneumonia, Viral / Q000453:epidemiology*; D011051:Poliomyelitis / Q000453:epidemiology*; D014777:Virus Diseases / Q000453:epidemiology*