| Description | Typed letter from Sonnabend to John Maddox, editor of Nature, London. Letter concerns HTLV1 and 2 and the possibility of four T lymphotropic viruses associated with AIDS, to the effect of questioning Dr. Groopman's assertion that the causation of AIDS is known. Filed by Dr Simon Watney under the title 'Early multi-factorial notes + related'; associated letter to 'Nature' by Groopman 'Causation of AIDS revealed', with note attached from Lilian Waldman |