The World Health Organization is warning that recent outbreaks of polio in the Middle East, Africa and Asia mark a setback to the decades-long effort to eradicate the disease. In response, the WHO has declared a world health emergency. It's asking Syria, Pakistan and Cameroon — current polio hot spots — to require all travelers leaving those countries to show proof of vaccination.
Copyright 2021 NPR. To see more, visit https://www.npr.org. 9(MDAyMjQ1NzYwMDEyMjU5MjA0MjE0Yzg1Mg004))
