The first study used spatial analysis to show that the earliest known COVID-19 cases, diagnosed in December 2019, were centered on the Wuhan market.
A new analysis of genetic samples collected from a seafood market in central China's Wuhan city shows the presence of the SARS-CoV-2 virus in raccoon dogs sold at the venue, strengthening the case for the natural origin of the Covid-19 pandemic, according to a team of international experts.