title: Number of cases in Yemen polio outbreak increases dramatically.
mesh_terms: D017677:Age Distribution; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000517:prevention & control* / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control*; D011159:Population Surveillance; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D015006:Yemen / Q000453:epidemiology