"We are in hell! No electricity, no clean drinking water! This is no life, we were better off at home!" fumes Arjumand Khanum, a refugee from Bajaur Agency, on the Pakistan-Afghanistan border.
The polio eradication campaign has ground to a halt in the Swat Valley, in northern Pakistan, with the breakdown of a peace agreement with a hardline militant group.
Health workers fanned out into hundreds of villages in a troubled north-western district of Pakistan to immunise children against polio following a peace agreement with a pro-Taliban faction that had campaigned against the vaccine.