World has two weeks to replace problem polio vaccine: WHO

The World Health Organisation on Friday gave countries two weeks to replace a problem polio vaccine blamed for some outbreaks of the crippling disease, which the UN health agency is hoping to wipe out once and for all. WHO has warned that the live polio virus used in some vaccines is one of the biggest obstacles to eradicating the disease. For the past year and a half, 155 countries and territories have been gearing up to make the shift away from the problem vaccine, with the big switch set to b