Reviews of new research at public agencies and private institutions

"Emerging Infections: Microbial Threats to Health in the United States."
Inst. of Medicine, National Academy Press, 2101 Constitution Ave. N.W., Washington, D.C. 20418.
294 pp. $34.95.
Editors:Joshua Lederberg, Robert E. Shope, and Stanley C. Oaks, Jr.
During the 1950s, American physicians and public-health officials concluded that progress in medicine and pub- lic health was making the con- quest of infectious i...