Unsafe sexual activity usually occurs when individuals have been drinking or using drugs. Studies show that many male and female prostitutes use drugs and alcohol and then participate in sexual activities that could lead to AIDS. While many female prostitutes in African countries test HIV positive, an increasing number of female prostitutes in Western countries who use drugs have tested HIV positive, thus establishing a clear link between high risk drug-taking and unsafe sex. Research is needed to assess how much prostitutes know about AIDS and how to avoid it through safer sex practices. 67 references. (Author abstract modified)