| molecular epidemiology of hepatitis c virus subtype 3a in injecting drug users. | hepatitis c virus subtype 3a (hcv-3a) originates from asia and has spread widely among injecting drug users as well as other patient groups in industrialized countries. hcv subtype 3a infection remains highly prevalent and frequently transmitted in the population of intravenous drug users. the objective of this study was to understand better the mechanisms of the worldwide hcv-3a epidemics in drug users. ninety-three sera from hcv-3a-infected idus from france, the united states, brazil, argentin ... | 2006 | 16927280 |