Epidemiologic investigation of an outbreak of infectious hepatitis in Costa Rica.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D003364:Costa Rica; D004812:Epidemiologic Methods; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012423:Rural Health; D012723:Sex; D012924:Social Conditions; D014881:Water Supply; D014887:Weather