Violence, fear & suspicion imperil Pakistan's war on polio

ISLAMABAD, Pakistan (Reuters) - Pakistani health worker Bushra Bibi spent eight years trekking to remote villages, carefully dripping polio vaccine into toddlers' pursed mouths to protect them from the crippling disease. Now the 35-year-old mother is too scared to go to work after masked men on motorbikes gunned down nine of her fellow health workers in a string of attacks this week. "I have seen so much pain in the eyes of mothers whose children have been infected. So I have never seen this as just a job. It is my passion," she said. "But I also have a family to look after ... ...