Mirwais Hospital in Kandahar serves over 4 million people across southern Afghanistan. As fighting in the region intensifies, the number of casualties through its doors is also rising sharply. Most of the injured are civilians, caught in roadside explosions, air strikes and gunfire. There are two to a bed in the children's ward and the operating theatre has to work 24 hours a day as doctors and nurses struggle to save lives in this war-torn country.