Increased incidence of hepatitis A in south east England.
D000328:Adult; D004739:England / Q000453:epidemiology; D006506:Hepatitis A / Q000453:epidemiology* / Q000517:prevention & control; D006716:Homosexuality; D006801:Humans; D015994:Incidence; D008297:Male; D008403:Mass Screening; D012307:Risk Factors