PSI has been working in Tanzania since 1993 through social marketing and health communications for HIV, reproductive health, malaria and diarrheal disease prevention. With support from multilateral and bilateral donor organizations (The Global Fund to Fight AIDS, Tuberculosis and Malaria; KfW; The United States Agency for International Development; the Royal Netherlands Embassy; and Irish Aid) and the Tanzanian government, PSI/Tanzania plays a leading role in the distribution and promotion of affordable, essential health products and services, and assisting in the development of private sector enterprise in the country.