[caminante]

> For example, there were cases as early as December 2019 that did not come from Wuhan.

No.

This isn't deducible from the article YOU linked!

Not having a link to the seafood marketplace in Wuhan != originating from outside Wuhan.

> The paper, written by a large group of Chinese researchers

> Their data also show that, in total, 13 of the 41 cases had no link to the marketplace.

> the virus possibly spread silently between people in Wuhan—and perhaps elsewhere—before the cluster of cases from the city’s now-infamous Huanan Seafood Wholesale Market was discovered in late December.