The World Health Organization (WHO) is a specialized agency of the United Nations responsible for promoting global public health. Founded in 1948 and headquartered in Geneva, Switzerland, WHO works with countries and partners to prevent and respond to health emergencies, improve access to essential healthcare services, and address issues such as infectious diseases, noncommunicable diseases, and environmental health risks. The organization also sets international health standards, conducts research, and provides guidance to governments to strengthen health systems and improve overall well-being worldwide.