There are three countries in the world that still have an epidemic of the polio virus and the third, Nigeria, is almost polio free. Pakistan, on the other hand, is experiencing a rise in polio cases.
Pakistan had lowered its polio cases to 12 last year and has increased almost 5 times to 69 cases. Afghanistan is at 12 cases reported this year which is a decrease from 21 cases last year.
Nigeria has been polio free for the past three years but since they were 4 cases reported in 2016, they have not been declared polio free yet but will most likely get that coveted title by next year.
Data courtesy: http://polioeradication.org/