RESUMEN
These bases of the National AIDS Prevention an Control Program in Cuba are explained, and the results are presented from studies on the prevalences of seropositivity for human immunodeficiency virus (HIV) are presented. To date, 2 224 748 serological tests have been administered to detect HIV antibody in high-risk and other population groups, yielding a seropositivity prevalence of 0.01/100. This program has screened approximately once-third of the sexually active population. The prevalence of seropositivy in the general population and among blood donors is on the order of 1 per 50 000 and is on the decline. The prevalence of seropositivity in high-risk groups, although higher than in the general population, is relatively low in comparison with similar groups in other countries