Memo from the Chief Medical Officer CMO to the Secretary of State regarding AIDS and the treatment of haemophiliacs. Outlines that since 1985 all Factor VIII produced at the Blood Products Laboratory BPL Elstree has been heat treated and no commercial Factor VIII has been imported into the UK in an un-heat-treated form since December 1984. States that it is extremely unlikely that any patients with haemophilia treated in the UK will in future be infected with HTLVIII virus. Handwritten annotation that a sadly a very high proportion of the Haemophilic population has already been infected due to previous use of un-heat-treated Factor VIII.