Yellow fever.
D000293:Adolescent; D000328:Adult; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007630:Kenya / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D014611:Vaccination; D015004:Yellow Fever / Q000453:epidemiology* / Q000517:prevention & control