least four (called XDR-TB) first-line tuberculosis drugs. Due to the contagious nature of tuberculosis, drug resistance is considered to be a serious public health issue, particularly among people with an already weakened immune system, for example people living with HIV. Donors The TB Alliance has a diverse set of global partnerships with both public and private sector donors that fund the company’s work. The organization operates with the support of: Australia Department of Foreign Affairs and Trade Bill & Melinda Gates Foundation Germany's Federal Ministry of Education and Research through KfW Global Health Innovative Technology (GHIT) Fund Indonesia Health Fund Irish Aid Medical Research Council (United Kingdom) National Institute of Allergy and Infectious Disease Netherlands Ministry of Foreign Affairs UK Department of International Development (DFID) UK Department of Health United States Agency for International Development (USAID) References External links TB Alliance The Stop TB Partnership Tuberculosis organizations International medical and health organizations