It’s from the oral vaccine that they use in Africa and places- https://www.statnews.com/2022/07/21/n-y-state-detects-polio-case-first-in-the-u-s-since-2013/
It’s from the oral vaccine that they use in Africa and places- https://www.statnews.com/2022/07/21/n-y-state-detects-polio-case-first-in-the-u-s-since-2013/