The clinical and laboratory data available on hepatitis A virus infections reported in Europe were reviewed by the Blood Pro ducts Advisory Committee of the Food and Drug Administration. The panel's consensus was that the clotting factor concentrates currently available in the United States are safe with respect to viral diseases, hepatitis A transmissions do not appear to be a significant health problem, and there is a paucity of epidemiologic data on hepatitis A in patients with hemophilia in the United States.