Having contracted polio as a child, Usman Shangla, aged 32, ensured his eldest children were vaccinated against the crippling disease. Usman decided not to vaccinate his youngest son Musharaf, after hearing false rumours about the vaccination campaign. Musharaf contracted polio this year, but is responding well to intensive treatment. Pakistan is one of only three countries in the world where polio remains endemic . Suspicions about the polio vaccine continue to linger in some parts of the country and have led to violent attacks on health workers advocating immunisation