WHO is the leading global authority on public health, responsible for coordinating international efforts to prevent and respond to health emergencies, promote health equity, and strengthen health systems worldwide. Through scientific research, technical assistance, and policy guidance, WHO addresses a wide range of health challenges, from infectious diseases and non-communicable diseases to environmental health hazards and health emergencies. By advocating for universal health coverage, health equity, and disease prevention, WHO strives to achieve its vision of a world where all people attain the highest possible level of health and well-being.