Health. The Covid-19 was already in France in November 2019


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.

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