Commentary: Contrary findings from Guinea-Bissau and Papua New Guinea.
Aaby
Peter
P
Bandim Health Project, Danish Epidemiology Science Centre/Statens Serum Institut, Apartado 861, Bissau, Guinea-Bissau. psb@mail.gtelecom.gw
Jensen
Henrik
H
D015982:Bias; D003906:Developing Countries; D006169:Guinea-Bissau / Q000453:epidemiology; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D032541:Mass Vaccination; D010219:Papua New Guinea / Q000453:epidemiology