We believe that the greatest hope for stopping the spread of HIV infection lies in the voluntary cooperation of those at higher risk--their willingness to undergo testing and to alter their personal behavior and goals in the interests of the community. But we can expect this voluntary cooperation--in some cases, sacrifice--only if the legitimate interests of these groups and individuals in being protected from discrimination are heeded by legislators, professionals, and the public. Yet voluntary testing is not enough. We must proceed with vigorous research and educational efforts to eliminate both the scourge of AIDS and the social havoc that has accompanied it.