Retroviruses 6:501C507 [PMC free article] [PubMed] [Google Scholar] 6. 50-fold less) (Table 1). Open in a separate window Fig 1 HIV-1 Western blot results at three MACS clinic visits. K0, K1, and K2 are negative, weak positive, and strong positive controls, respectively. P1, P2, and P3 are before, during (6 Continue Reading