摘要:The social and biomedical dimensions of AIDS coalesce in the field of education as students and teachers struggle to make sense out of the multiple, and oftentimes conflicting, messages about the disease circulating inside and outside their classrooms. Johnny Sachs (this issue) provides a poignant example of this struggle in the case of South Africa, where President Thabo Mbeki has questioned the prevailing view that HIV causes AIDS and can be effectively treated with anti-retroviral drugs. Although he has recently moved away from this position, at least in public, the President's views present South Africans with mixed messages about the prevention and treatment of AIDS. Controversy about the etiology of the disease extends beyond Pretoria, with scientists, journalists, and politicians in many countries engaging in lively discussions over the process by which SIV (simian immunodeficiency virus), found in certain non-human primates, was transferred from chimpanzees to humans (Cohen, 2000). Even more acrimonious are current debates among health officials, AIDS activists, and pharmaceutical companies over drug pricing and patent contracts for triple therapy medications in the Third World (Rosenberg, 2001).