[MASS VACCINATION CAMPAIGN WITH ATTENUATED LIVE POLIOVIRUS AND PROBLEMS POSED BY ITS PLANNING].
D001530:Belgium; D030015:Enterovirus C, Human; D006801:Humans; D032541:Mass Vaccination; D017955:Poliovirus; D011055:Poliovirus Vaccine, Oral; D013223:Statistics as Topic; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral
BELGIUM; POLIOVIRUS VACCINE, ORAL; STATISTICS; VACCINATION
CAMPAGNE DE VACCINATION DE MASSE PAR LE POLIOVIRUS VIVANT ATT'ENU'E ET PROBL'EMES POS'ES PAR SA R'EALISATION.