title: Yellow fever virus surveillance in Western Africa.
mesh_terms: D000328:Adult; D000354:Africa, Western / Q000453:epidemiology; D000818:Animals; D002648:Child; D004196:Disease Outbreaks; D005869:Ghana / Q000453:epidemiology; D006801:Humans; D011159:Population Surveillance; D012675:Senegal / Q000453:epidemiology; D015004:Yellow Fever / Q000453:epidemiology*