Report with Annexes by Dr J Craske (Chairman, Haemophilia Centre Directors Hepatitis Working Party). Topics covered include the structure of the working party, a Hepatitis C surveillance study and comparison of 1978-79 to 1976-77, the relationship of Hepatitis to different brands of concentrate, a report of mortality rates due to acute Hepatitis and a prevention of virus infection. Appendix 1 presents a progress report on Liver disease in haemophiliacs, and several tables are attached to the report detailing various studies and statistics such as batches/ brands of Factor VIII associated with Hepatitis.