The United Nations Children’s Fund is a United Nations agency responsible for providing humanitarian and developmental aid to children worldwide. Based in U.N. headquarters in New York City, it is among the most widespread and recognizable social welfare organizations in the world, with a presence in 192 countries and territories. UNICEF’s activities include immunizations and disease prevention, administering treatment for children and mothers with HIV, enhancing childhood and maternal nutrition, improving sanitation, promoting education, and providing emergency relief in response to disasters.