Full text: Available Index: IMSEAR (South-East Asia) Main subject: Poliomyelitis / Humans / Child / Child, Preschool / Retrospective Studies / Risk Factors / Developing Countries / Health Services Misuse / India / Injections, Intramuscular Type of study: Etiology study / Observational study / Risk factors Country/Region as subject: Asia Language: English Journal: Indian J Pediatr Year: 1993 Type: Article