Twelve authoritative reviews with tables, illustrations, and references: prevalence of HIV infection in the U.S., assessment of risk for infection in occupational settings, priorities for reduction of risks in various risk-defined populations, laboratory tests for HIV infection, natural history and predictors of progression, clinical implications of HIV-2 in West Africa, management of pneumocystis pneumonia, prophylaxis of opportunistic infections, neuropsychologic problems, associated lymphomas, pruritus, and zidovudine in symptomatic disease. Subject index. (EJH)