title: A survey of age at first immunization in the Aiyura Valley.
authors.forename: Jean E
authors.initials: JE
authors.lastname: Weir
mesh_terms: D002675:Child, Preschool; D003625:Data Collection; D006801:Humans; D007114:Immunization / Q000592:standards*; D007223:Infant; D010219:Papua New Guinea