Cases of polio detected in Yemen.
D002648:Child; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D011051:Poliomyelitis / Q000453:epidemiology*; D011159:Population Surveillance; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D015006:Yemen / Q000453:epidemiology