Economy WHO says spread of polio remains international health emergency Updated : November 30, 2018 09:33 PM IST Latest WHO figures show there have been 27 cases of wild polio so far in 2018 - all of them in Pakistan and Afghanistan where the contagious viral disease is endemic. The disease can be prevented with vaccination, but immunisation coverage rates need to be very high and any gaps allow the virus to fight back. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.