sauce for AP article:
UN says new polio outbreak in Sudan caused by oral vaccine
By MARIA CHENG
September 2, 2020
https://apnews.com/619efb65b9eeec5650f011b960a152e9
"LONDON (AP) — The World Health Organization says a new polio outbreak in Sudan is linked to an ongoing vaccine-sparked epidemic in Chad — a week after the U.N. health agency declared the African continent free of the wild polio virus."