[Post-transfusional hepatitis B: a solvable problem? (author's transl)].

Forty-four patients with haemophilia A or von Willebrand-Jürgens syndrome were followed for three years. They received about 28 000 cryoprecipitate produced in the author's laboratories, without a single case of hepatitis B. There were seven among these patients who had no antibodies against surface antigen: they had received a total of 2533 cryoprecipitate. There were no seroconversion or transaminase changes in comparison with values before cryoprecipitates.