- Kudos for Dr. Koop [Letter to the Editor of the Washington Times]1
- Letter from Alan P. Brownstein, National Hemophilia Foundation to C. Everett Koop1
- Letter from Albert E. Cowdrey, National Institutes of Health to Joshua Lederberg1
- Letter from Alexander H. Flax, National Academy of Engineering to Joshua Lederberg1
- Letter from Ambassador Meir Rosenne, Embassy of Israel to C. Everett Koop1
- Letter from Arnold O. Beckman to Joshua Lederberg1
- Letter from Barbara J. Bachmann to Joshua Lederberg1
- Letter from Bernard Barber to Joshua Lederberg1
- Letter from Bob Dole, Joe Biden, Rudy Boschwitz, Chic Hecht to Marshall W. Nirenberg1
- Letter from Bradley Hundley, Rockefeller University Press to Stephen Cooper1
- Letter from C. Everett Koop to George R. Pettersen, County of San Bernardino Department of Public Health1
- Letter from C. Everett Koop to Sergey P. Burenkov, Union of Soviet Socialist Republics Ministry of Health1
- Letter from C. Everett Koop to Time Magazine1
- Letter from C. Everett Koop to United States Postmaster General Robert Tisch1
- Letter from Carol M. Sussman, American Red Cross to Michael Samuels1
- Letter from David Baltimore, Whitehead Institute to Harold Varmus1
- Letter from David Schiff to Marshall W. Nirenberg1
- Letter from Edward D. Frohlich to Edward D. Freis1
- Letter from Edward P. Mulvey and Jeffrey L. Haugaard, University of Pittsburgh School of Medicine to C. Everett Koop1
- Letter from Edwin C. Whitehead and Paul G. Rogers to Marshall W. Nirenberg1