Letter from B. T. Colvin to Dr. R. Tedder, The Middlesex Hospital Medical School, re anti HTLV III Survey, enclosing the survey results. Includes a letter from John Craske, Philip Mortimer, Richard Tedder and Robin Weiss, the Middlesex Hospital Medical School and University College London, (dated 8th January 1985), in relation to serological testing on patients receiving blood products. Also includes an anti-HTLV III serology result sheet from the London Hospital Haemophilia Centre and an AIDS survey with a list of patient names.