Immunisation status of children in Port Harcourt before and after commencing the expanded programme on immunisation.
Oruamabo
R S
RS
Okoji
G O
GO
D000554:Ambulatory Care Facilities; D002675:Child, Preschool; D006801:Humans; D007114:Immunization / Q000639:trends*; D007223:Infant; D009549:Nigeria