| Description | Letters received and sent by Joseph Sonnabend relating to AIDS and interferon including a letter from Sir Peter Medawar, Kevan Hartshon (Harvard Medical School) and letter from Ivan B John with attached article and Medline search on steroids/ACTH/T cells. Correspondence relate to discussion about interferon research and also about a research position as Associate Research Scientist at Columbia University at St Luke's Hospital. Added 2022: Personal letter from Stephen S Hall re his interferon research |