pakistan had almost completely eradicated polio , a devastating disease which paralyses its victims ' legs but is preventable with a simple injection that today , it 's on the rise again after the taliban declared the vaccine to be a ` western conspiracy ' and a ` bio-weapon ' that would actually make children sick , and waged violent attacks against those found to be supplying it .
but mother-of-three farhina touseef - the subject of channel 4 's unreported world - risking her life by leading a team of medics .