SAN FRANCISCO, CALIFORNIA 94143 December 19, 1954 Dr. David IJ. Kingsbury Sir William Dunn School of University of Oxford South Parks Road Oxford OX1 3RE ENGLAND Pathology Dear David: Thanks for your newsLettere As you prc,ably know, we have updated the summary of Retroviridae for Intervirology (a minor task), and we are anticipating some difficulty with finding a suitable name for the AIDS virus. I am waiting for the dust to settle from the nucleotide sequencing (done or almost done in four labs at least) before convening a subcommittee. But it is clear that the AIDS virus is no more related to HTLV-I than to any other retrovirus on the basis of sequence comparison. Would you like to tell Bob Gallo it shouldn't be called HTLV-ITI? Best regards, Harold E, Varmus, M.D. American Cancer Society Professor of Molecular Virology HEV/ j m