Vaccine-derived poliomyelitis is on the rise. A new vaccine aims to stop the spread


Countries in Africa, the Middle East and parts of Asia have more cases of vaccine-derived polio. One of the reasons for this, experts say, is that vaccination efforts ceased during the pandemic.

(Image credit: Nicholas Kajoba/Xinhua News Agency via Getty Images)

Vaccine-derived poliomyelitis is on the rise. A new vaccine aims to stop the spread


npr

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