It has been shown that neuroleukin, a secretary product of T cells, is partly homologous to HIV gp 120 envelope protein (3). Since HIV naive T cells sometimes induce the production of antibodies against HIV coat proteins in a new host (1), it is suggested that the development of AIDS in HIV-infected people could be prevented by means of T cells stimulated with superantigens of either bacterial (4) or viral origin (5, 6).