By relying on the medical examinations (biological examinations, etc.) of a representative sample, the Constance cohort has for years been providing a precise overview of the health of the French population.
French researchers therefore had the idea of using it to study, retrospectively, the serological status of anti-SARS-CoV-2 antibodies in the participants of the cohort. And therefore to assess from when the Covid-19 is present in France.
To do this, they selected 9,144 serum samples collected between November 4, 2019 and March 16, 2020 from volunteers living in the 12 regions of metropolitan France.
Results: Anti-SARS-CoV-2 antibodies were detected in 353 participants (3.9%). The proportion of positive participants increased from 1.9% in November and 1.3% in December to 5.0% in January, 5.2% in February and 6.7% in the first half of March.
You will understand, this means that the virus was already circulating in November 2019! However, in France, the first “official” case was reported on January 24, 2020. The fact that the virus was present in France two months earlier opens up many questions, in particular as regards the dissemination of the virus.
Source: A la Une – Le Progrès | Le Progrès by www.leprogres.fr.
*The article has been translated based on the content of A la Une – Le Progrès | Le Progrès by www.leprogres.fr. If there is any problem regarding the content, copyright, please leave a report below the article. We will try to process as quickly as possible to protect the rights of the author. Thank you very much!
*We just want readers to access information more quickly and easily with other multilingual content, instead of information only available in a certain language.
*We always respect the copyright of the content of the author and always include the original link of the source article.If the author disagrees, just leave the report below the article, the article will be edited or deleted at the request of the author. Thanks very much! Best regards!