Poliomyelitis outbreak.
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000415:Albania / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D011159:Population Surveillance; D012307:Risk Factors