Since the time this study was completed, the Department of STD, Aids and Viral Hepatitis (part of Brazilian Ministry of Health's Surveillance Secretariat) has continued to shape its public health strategies for prevention of HIV transmission, and has recently joined a handful of other countries in providing free, government sponsored antiretroviral TasP for HIV positive individuals who are in discordant couples regardless of CD4 cell count [14]. Here, CD4 is linked to animal viral hepatitis.