
An Afghan health worker gives a polio vaccine to a child during a vaccination campaign in Kandahar city, capital of southern Kandahar province of Afghanistan, Oct. 18, 2015. (Xinhua/Sanaullah)

An Afghan health worker gives a polio vaccine to a child during a vaccination campaign in Kandahar city, capital of southern Kandahar province of Afghanistan, Oct. 18, 2015. (Xinhua/Sanaullah)