According to a new study, the Chinese lab suspected of leaking Covid-19 might also have been responsible for another dangerous virus outbreak. This virus is a rare strain of polio that appeared in 2014.

Here's what happened: In 2014, a four-year-old boy in China’s Anhui province got sick with an unusual type of polio, named WIV14. Researchers from France’s Pasteur Institute have now found that this polio strain is 99% identical to a type of polio stored at the Wuhan Institute of Virology...