1. Jẹ anfaani awọn ọjọ ti ya sọtọ fun gbigba abẹrẹ ajẹsara fun awọn ọmọ wẹwẹ Publication: Nigeria : Johns Hopkins University, Population Communication Services, 1997 Subject(s): Mass VaccinationChild Health ServicesPoliomyelitis -- prevention & controlPoliovirus VaccinesNigeria
