ABSTRACT
In many areas, the spread of HIV-1 among injecting drug users (IDUs) due to the multi-person use of drug injection equipment has occurred with extreme rapidity. In New York City, for example, HIV-1 seroprevalence among IDUs increased from under 10 per cent to over 50 per cent in a period of five years (Des Jarlais et al., 1989); in Edinburgh, HIV-1 seroprevalence among IDUs increased from zero to over 40 per cent in one year (Robertson et al., 1986); in Bangkok, HIV-1 seroprevalence increased from 2 per cent to over 40 per cent in two years (Vanichseni and Sakuntanaga, 1990); and in the state of Manipur, India, levels increased from zero to approximately 50 per cent in one year (Naik et al., 1991). HIV-1 has spread rapidly among populations where there has been a lack of awareness of AIDS as a local threat and mechanisms such as ‘shooting galleries’, ‘dealer’s works’ and professional injectors that provide rapid and efficient mixing among large numbers of IDUs (Friedman and Des Jarlais, 1991).
