Serological investigation on endemicity of poliomyelitis in Calcutta and in a neighbouring rural area.
D002648:Child; D002675:Child, Preschool; D004197:Disease Reservoirs; D004813:Epidemiology; D006801:Humans; D066298:In Vitro Techniques; D007194:India; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology*; D012423:Rural Health; D012698:Serologic Tests