Japanese Journal of Infectious Diseases · 2003 · 12 citations · 0 references
MedicineChild HealthInfectious DiseasesImmunizationPediatric Infectious DiseasesVaccinologyImmunization PolicyInfectious Disease PreventionPediatric ImmunizationVaccinationVaccination PolicyVaccine-preventable DiseasesChildhood Immunization CoveragePediatric VaccinationPoliovirus VaccinationPoliovirus VaccinesVaccination Coverage In Children