title: Epidemiology of type A infections.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002170:Canada; D002648:Child; D003604:Czechoslovakia; D004196:Disease Outbreaks; D005260:Female; D005516:Food Microbiology; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D007557:Israel; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D009520:New Zealand; D012572:School Health Services; D012621:Seasons; D012737:Sex Factors; D014481:United States; D014871:Water Microbiology