Recent results of mass immunization against poliomyelitis with Koprowski strains of attenuated live poliovirus.
D001699:Biometry; D004644:Emotions; D030015:Enterovirus C, Human; D006801:Humans; D032541:Mass Vaccination; D011051:Poliomyelitis / Q000276:immunology*; D017955:Poliovirus; D014611:Vaccination / Q000706:statistics & numerical data*
POLIOMYELITIS/immunology; VACCINATION/statistics