AN EPIDEMIOLOGICAL EVALUATION OF THE EFFECT OF THE ORAL POLIOMYELITIS VACCINE.
D001699:Biometry; D007564:Japan; D011051:Poliomyelitis; D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines; D013223:Statistics as Topic
D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines
JAPAN; POLIOVIRUS VACCINE, ORAL; STATISTICS