There has been a claim that #SARSCoV2 has been in circulation in Barcelona in March 2019. This is remarkably implausible. All the genomic evidence available (~100k genomes) points to an origin of the virus around November 2019 in China (e.g. below). (1/6) https://t.co/f20jzPfH5f pic.twitter.com/e6WQUBI69R

— Prof Francois Balloux (@BallouxFrancois) June 27, 2020