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First cases appeared in November, identified in December.
The virus SARS-CoV-2 was first detected in Spain in March 2019, then cases appeared in Italy the following September, and later in France by November. Shortly after that, showed up in China. The virus was finally identified in December of 2019 by the Chinese, hence the name "COVID-19" and not "COVID-20"








SARS-CoV-2 detected in waste waters in Barcelona on March 12, 2019
https://www.ub.edu/web/ub/en/menu_eines/noticies/2020/06/042.html


Sentinel surveillance of SARS-CoV-2 in wastewater anticipates the occurrence of COVID-19 cases from March 2019
https://www.medrxiv.org/content/10.1101/2020.06.13.20129627v1




Covid-19 was present in Italy as early as September 2019, study of lung cancer screenings shows
https://www.rt.com/news/506796-coronavirus-italy-blood-september/


SARS-COV-2 virus that causes COVID-19 found in Italy in September 2019, several months before showing up in China.
https://journals.sagepub.com/doi/10.1177/0300891620974755