Inactivation and removal of human immunodeficiency virus in monoclonal purified antihemophilic factor (human) (Hemofil M).

Cold supernatant which was prepared from factor VIII:C containing cryoprecipitate was seeded with HIV-1, then treated with a mixture of tri (n-butyl) phosphate (TNBP) and triton X-100. A greater than 10(11)-fold reduction of HIV-1 infectivity was observed. In a separate experiment, cold supernatant which had been seeded with HIV-1 was chromatographed on an immunoaffinity column, resulting in a 10(4)-fold reduction of infectivity. None of the 17 patients treated with the purified product and followed for at least three months has shown serologic evidence of HIV-1 or other viral infections.