UNICEF work for and with children in 157 countries and territories, advocating for children's rights, ensuring their basic needs are met and enabling them to reach their full potential. UNICEF's programming priorities include immunization, girls' education, HIV and AIDS, child protectioin, and early childhood development. UNICEF is also present whenever emergencies strike, working to ensure the well-being and development of children. As a result of more than 50 years of UNICEF working on the ground around the world, the lives of millions of children have been saved and improved.