Bill Gates meets with lab technicians of the HIV Pathogenesis Programme. (KwaZulu-Natal, South Africa, 2009)
A vaccine and other new prevention options are urgently needed. Despite the proven effectiveness of existing prevention approaches, they have limitations. For example, many women are not in a position to insist that their partners wear condoms. The development of a vaccine and other new prevention options is critical for successfully fighting the epidemic, especially in developing countries.