| needle exchange use, sexual risk behaviour, and the prevalence of hiv, hepatitis b virus, and hepatitis c virus infections among bulgarian injection drug users. | at a time when the rates of hiv, hepatitis c virus (hcv), and hepatitis b virus (hbv) infections have risen among injection drug users (idus) in other countries in the region, little is known about the prevalence of these infections among bulgarian injectors and about their sexual risk behaviours. idus (n = 773) in a community-based needle exchange programme (nep) and two major drug treatment facilities in sofia completed a structured interview and were tested for hiv, hbv, and hcv antibodies. w ... | 2006 | 16942654 |