Comparative epidemiological study in infectious hepatitis and poliomyelitis.
D016021:Epidemiologic Studies; D006505:Hepatitis; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology*; D014765:Viral Vaccines
D014765:Viral Vaccines
HEPATITIS, INFECTIOUS/epidemiology; POLIOMYELITIS/epidemiology