Letter from A. L. Bloom to D. G. Watters of The Haemophilia Society re the status of AIDS in the UK, recommendations of the World Federation of Haemophilia Medical Board, and enclosing a letter from David Watters to A. L. Bloom of the Department of Haematology at the University Hospital of Wales re the distinction between true Haemophilia Centres and places where treatment may be available, and AIDS.