COVID-19 pandemic have been complicated by factors including the massive surge of human infections in the pandemic's first two years and an increasingly bitter political dispute.
It took virus experts more than a dozen years to pinpoint the animal origin of SARS, a related virus. Goldstein and his colleagues say their analysis is the first solid indication that there may have been wildlife infected with the coronavirus at the market.
But it is also possible that humans brought the virus to the market and infected the raccoon dogs, or that infected humans simply happened to leave traces of the virus near the animals.
After scientists in the group contacted the China CDC, they say, the sequences were removed from the global virus database. Researchers are puzzled as to why data on the samples collected over three years ago wasn’t made public sooner.