Two companies making vaccines to help the world eradicate polio are failing to produce enough, so many countries should prepare to give lower doses to make stocks last, a group of experts has advised the World Health Organization.
With polio on the brink of eradication globally, the WHO wants to see a worldwide switch from the traditional “live” oral polio vaccine, which runs the risk of spreading the disease, to an inactivated vaccine that needs to be injected
