Abstract
Since June 1981, the Centers for Disease Control (CDC) has learned of an increased occurrence of Kaposi's sarcoma, Pneumocystis carinii pneumonia, and other serious opportunistic infections concentrated among homosexual men in the United States. After receiving the initial reports,1 , 2 the CDC formed a task force to undertake surveillance for these disorders and conduct epidemiologic and laboratory investigations. This report describes these surveillance activities and summarizes current knowledge of the epidemiologic aspects of this outbreak.Surveillance and Reporting MethodsCase-report forms were completed for biopsy-proved cases of Kaposi's sarcoma in persons under 60 years of age without underlying immunosuppressive disease or . . .