Evaluation of Sabin live poliovirus vaccine in Japan: I. General preface.
D006801:Humans; D007564:Japan; D011051:Poliomyelitis / Q000453:epidemiology / Q000401:mortality / Q000517:prevention & control; D011055:Poliovirus Vaccine, Oral; D011314:Preventive Health Services; D011635:Public Health Administration; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral