Cost a concern as China commits to inactivated polio vaccines

In an effort to respond to the World Health Organization's call for a polio-free world, China has decided to shift to the use of safer injected, inactivated polio vaccines (IPVs) by 2018, marking a step away from the current oral polio vaccine (OPV), which has been widely administered in the country since the 1960's due to its low cost and high efficacy.