1. seropositive London,1973
2. US Cities 1982 HBsAg
3. Sheffield 1984-5
4. West Berlin 1986
5. Hepatitis A Hepatitis A virus is spread by the faecal-oral route and sexual transmission is thought not to be a major mode of transmission although there is evidence for an increased risk among homosexual men. An excess of cases of non-B hepatitis in men age 20-40 years was reported in San Francisco in 1979, before the development of specific HAV assays.30 A study of attenders at a GUM clinic in Seattle, USA3`