WHO Says Switch To New Vaccine Next Step To Eradicating Polio.

reported that this week, the World Health Organization will direct health teams across 150 countries to launch a new vaccine as the final step to eradicate polio. This vaccine would replace the current vaccine that has been used for over 30 years. Michel Zaffran, the director of polio eradication for the WHO, said that there have been only 12 cases of polio worldwide, in Pakistan and Afghanistan, but if the effort failed now, the virus could spread elsewhere. http://www.npr.org/sections/thetwo-way/2016/04/17/474580802/new-polio-vaccine-rolled-out-in-massive-synchronized-worldwide-switch