- Letter from H. Hunter Handsfield, Harborview Medical Center to Harold Varmus1
- Letter from Harold Varmus to Dani P. Bolognesi, Duke University Medical Center1
- Letter from Harold Varmus to David W. Kingsbury, Sir William Dunn School of Pathology, University of Oxford1
- Letter from Harold Varmus to Erling Norrby, Department of Virology, Karolinska Institute1
- Letter from Harold Varmus to George F. Vande Woude, National Institutes of Health1
- Letter from Harold Varmus to Howard M. Temin, McArdle Laboratory for Cancer Research1
- Letter from Harold Varmus to J. Michael Bishop1
- Letter from Harold Varmus to Joyce Wallace1
- Letter from Harold Varmus to Kumao Toyoshima, Institute of Medical Science (Japan)1
- Letter from Harold Varmus to Max Essex, Harvard School of Public Health1
- Letter from Harold Varmus to Maxine Singer1
- Letter from Harold Varmus to Natalie Teich, Imperial Cancer Research Fund Laboratories1
- Letter from Harold Varmus to Peter K. Vogt, University of Southern California School of Medicine1
- Letter from Harold Varmus to Robert C. Gallo, National Institutes of Health1
- Letter from Harold Varmus to fellow clinicians who work with AIDS patients on their suggestions for naming the AIDS virus1
- Letter from Hilary Wass to Harold Varmus1
- Letter from J. Allen McCutchan, University of California, San Diego Medical Center to Harold Varmus1
- Letter from J. Michael Bishop to Peter K. Vogt, University of Southern California School of Medicine1
- Letter from J. Oliver Lampen, American Cyanamid Company to Joshua Lederberg1
- Letter from J. Vivian Wells, Royal North Shore Hospital to Harold Varmus1