Battle against polio: More than 150 countries switch to new vaccine
A child receives anti-polio vaccination. More than 150 developing countries are switching to a new polio vaccine in the first worldwide vaccine change ever attempted. PHOTO | FILE
More than 150 developing countries are switching to a new polio vaccine in the first worldwide vaccine change ever attempted.
According to the World Health Organisation, every country using the oral polio vaccine will between April 17 and May 1 switch from the trivalent vaccine (tOPV) to the bivalent oral polio vaccine (bOPV).
