cialis This notion is contradicted by a report by the Transfusion Safety Study Group (TSSG), which compared HIV-negative and HIV-positive blood recipients who had been given transfusions for similar diseases. Approximately 3 years after the transfusion, the mean CD4+ T-cell count in 64 HIV-negative recipients was 850/mm3 of blood, while 111 HIV-seropositive individuals had average CD4+ T-cell counts of 375/mm3 of blood. By 1993, there were 37 cases of AIDS in the HIV-infected group, but not a single AIDS-defining illness in the HIV-seronegative transfusion recipients (et al. Ann Intern Med 1990;113:733; Cohen. Science 1994;266:1645).

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