[Preliminary study of the second dose of Sabin vaccine and beginning of routine vaccination against poliomyelitis in the interior of the state of Sao Paulo (Brazil)].
D001938:Brazil; D006801:Humans; D011051:Poliomyelitis; D011055:Poliovirus Vaccine, Oral; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral
POLIOMYELITIS; POLIOVIRUS VACCINE, ORAL; VACCINATION