THE REDUCTION OF WILD POLIOVIRUS CIRCULATION FOLLOWING VACCINATION WITH THE LIVE VACCINE. A NEW FACTOR IN THE OECOLOGY OF ENTERIC VIRUSES?
D000486:Allergy and Immunology; D003604:Czechoslovakia; D004770:Enterovirus; D030015:Enterovirus C, Human; D004813:Epidemiology; D006801:Humans; D011051:Poliomyelitis; D017955:Poliovirus; D023321:Poliovirus Vaccines; D014611:Vaccination
D023321:Poliovirus Vaccines
CZECHOSLOVAKIA; EPIDEMIOLOGY; IMMUNOLOGY; POLIOMYELITIS; POLIOVIRUS VACCINE