The correct answer is agencies such as UNICEF and WHO.
Indeed, the United Nations International Children's Emergency Fund (UNICEF) is tasked by the UN to provide food and medical assistance and care to children in war-torn zones and developing countries. It was created in 1946 to assist children in the countries in Europe that were devastated by the war.
The World Health Organization (WHO) was created in 1948 to eradicate smallpox and its mandate now includes the prevention of diseases and the research and response to pandemics. It also seeks to improve health conditions throughout the world and to report on the state of health around the globe.