The big unanswered questions about the covid-19 coronavirus

The coronavirus was first detected at the Huanan Seafood Wholesale Market in Wuhan, China

Héctor Retamal / AFP Getty Images

When the first symptoms of an unknown virus began to appear to Wuhan, China, in December 2019, scientists ran to perceive what was happening. In the five years that followed, they have not stopped running, with more than one million articles published in Sars-COV-2 and COVID-19. However, despite this spill, primary clinical questions about the virus remain.

At the beginning of the pandemic, it is transparent that the coronavirus can jump from humans to other animals and backs . . .

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