Circulars Circulars released by the DHSS to medical professionals and public sector workers relating to AIDS and HIV infection which includes a report published by the Advisory Committee on Dangerous Pathogens, entitled 'Revised Guidelines on LAV/HTLV III - Causative Agent of AIDS and related conditions'. 1986 and a circular from Chief Medical Officer of Health, Sir Donald Acheson, on the 1987 AIDS public awareness campaign with an attached leaflet, AIDS: Don't Die of Ignorance'. 1986-1989