UK Haemophilia Hepatitis Working Party - Annual Report for the Year 1982-3. Includes Appendix C(i) Factors to be considered in the selection of hepatitis reduced products for clinical trial - evaluation of residual infectivity for Hepatitis Viruses - p 4 Consideration must, therefore, be given to the possibility that factor VIII concentrate prepared from plasma donations obtained in the U.S.A. might be contaminated with a putative infectious agent associated with the cause of AIDS. Appendix C(ii) Incidence of acute hepatitis in patients with congenital coagulation defects treated by UK Haemophilia Centres during 1980-82. HT