Pediatrics Immunization e9a3bce8 Zero dose of polio vaccine is given: A Before giving DPT B At birth C When child is having diarrhea D When child is having polio High-Yield Explanation b. At birth(Ref: Nelson's 20/e p 1561, Ghai 8/e p 190-194)OPV zero dose: At birth or as early as possible within the first 15 days.