A health worker administers polio vaccine as part of a UNICEF-supported campaign in Damascus. Aid agencies sometimes have to negotiate with rebel groups and work in dangerous situations to immunize vulnerable children.
Syrian youths line up for food distribution in the Maiber al-Salam refugee camp in northern Syria, near the border with Turkey. The U.S. government has provided more than $1.5 billion in aid to Syrians since the uprising began in 2011.
Dimitar Dilkoff/AFP/Getty Images
As Aleppo residents in the Tariq al-Bab district recover from this week's attack by Syrian regime forces, delegates from the city are in Turkey holding an election for local officials.
Syrian people wait at a customs gate at the Turkey-Syria border near Reyhanli, Turkey, last week. Hundreds of thousands of people are fleeing central Syria, heading to southern Turkey.