Department of Microbiology & Immunology
University of Illinois

New York, San Francisco, and Los Angeles accounted for nearly half the new AIDS cases in early 1985. But the number of new cases in these cities has leveled off, and new cases here now represent 75 percent of the total. New AIDS cases among homosexuals are increasing slowly, but AIDS among intravenous drug users and AIDS associated with perinatal infection are increasing more rapidly.

J.M. Karon, T.J. Dondero, Jr., and Public Health Service workshop of 12 members, "HIV prevalence estimates and AIDS case projections for the United States: Report based upon a workshop," Morbidity and Mortality Weekly Report, 39, 1-31, 30 November 1990. (Centers for Disease Control, Atlanta; National Institutes of Health, Bethesda, Md.; Walter Reed Army Institute of Research, Washington, D.C.)

A linear string of amino acids folds spontaneously (without outside help) into a predetermined three-dimensional protein...

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