North and South Korea have favored polio vaccines over use of U.S. drones . Vaccination points have been set up in the entry and exit points to the tribal areas , he added . WHO estimates that children may not have access to the vaccine . Korea is one of few countries in the world where polio is still a problem .
North and South Korea have favored polio vaccines over use of U.S. drones . WHO estimates that children may not have access to the vaccine . Korea is one of few countries in the world where polio is still a problem .