abstract
- Co-infection with human T-lymphotropic virus types I or II (HTLV-I or -II) may be a cofactor in the progression of human immunodeficiency virus (HIV) infection. We assessed the frequency of simultaneous infection with these retroviruses among intravenous drug users from Westchester County, N.Y., a suburb of New York City. Comparison was made with similar studies in the United States and Europe.