Results from Italian researchers showed that 11.6% of 959 healthy volunteers who took part in a lung cancer screening trial between September 2019 and March 2020 developed antibodies to the coronavirus by February. Scientists say the findings, if correct, could change the history of the pandemic's origins, raising questions about when and where the virus first emerged.
https://www.usnews.com/news/world/articles/2020-11-19/researchers-say-study-on-covid-19-in-italy-doesnt-dispute-virus-origins