Collection: 01-internacional Database: MEDLINE Main subject: Child Care / Communicable Disease Control / Immunization Schedule / Vaccination / Infant Care Type of study: Observational_studies / Prognostic_studies Aspects: Determinantes_sociais_saude Limits: Child, preschool / Humans / Infant Country/Region as subject: Oceania Language: En Journal: Med J Aust Year: 1966 Document type: Article Country of publication: Australia