The United Nations (UN) is an international organization that was founded in 1945 to promote peace and security around the world. The UN body is made up of 193 member states and is responsible for a wide range of activities, including maintaining international peace and security, promoting human rights, providing humanitarian aid, and promoting sustainable development. WHO is the World Health Organization, which is a specialized agency of the UN that is responsible for international public health. It works to prevent and control diseases, promote health and well-being, and provide access to essential medicines and health care.