Solthis (Therapeutic Solidarity & Initiatives for Health) is an international health NGO. Founded in 2003 by physician-researchers, Solthis helps improve health for all in resource-limited settings by strenghtening national health systems on the long-term. We work to improve access to care and prevention, especially in the management of infectious diseases (HIV / AIDS, tuberculosis, hepatitis ...) and for maternal and child health.Through our actions of capacity building (training, organizational consulting, technical assistance), research and advocacy, we aim at strengthening the health systems' components: human resources, health services, health products and pharmaceutical system, laboratories, health information system, governance and financing. We always act according to the principle of non-substitution to support existing health structures.