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The prevalence of hepatitis B virus (HBV) surface antigen was significantly higher in urban (12.9%) than in rural (7.6%) populations (P = 0.003), but no difference was found in the prevalence of(More)
Several mechanisms have been proposed for explaining the protection of young children with hemoglobin AS from severe Plasmodium falciparum malaria. In a previous study carried out in Gabon, we have(More)