doctor

An Afghan health worker (2R) administers a polio vaccination to a child on the first day of a vaccination campaign in Herat. A new three-day nationwide immunisation campaign against polio began supported by Afghanistan's Ministry of Public Health country wide, officials said.

Aref Karimi/AFP

A health worker administers a polio vaccination to a child in Herat, Afghanistan, at the start of a three-day nationwide immunisation campaign against polio, supported by the country’s Ministry of Public Health