Full text: Available Index: IMSEAR (South-East Asia) Main subject: Poliomyelitis / Humans / Infant, Newborn / Poliovirus Vaccine, Oral / Child, Preschool / Incidence / Vaccination / India / Infant Type of study: Incidence study / Prognostic study Country/Region as subject: Asia Language: English Journal: Indian Pediatr Year: 1991 Type: Article