The big unanswered questions about the covid-19 coronavirus
The coronavirus was first detected at the Huanan Seafood Wholesale Market in Wuhan, China Hector Retamal/AFP via Getty Images When the first signs of an unknown virus began showing up in Wuhan, China, in December 2019, scientists raced to understand what was happening. In the five years since, they haven’t stopped running, with over 1 … Read more