Rick Weiss, in Science News (Sept.

A New Andromeda
23, 1989), 1719 N St. N.W., Washington, D.C. 20036.

Strain?
What if the AIDS virus could spread as eas-ily as the common cold?
That horrifying possibility is not ruled out medical researchers, reports Weiss, a Science News correspondent. Viruses have recently been found to possess an alarmingly high propensity to mutation- once in every 10,000 replications. In 1983, Tenn. "There are millions of us 'chickens' just waiting to be infect...