“Sars-Cov2 was probably in circulation in France as early as November 2019. This is what the retrospective analysis of the data from the Bio-banque de Constance shows. Other results on the feeling of loneliness among young people during confinement, also to be found on the Constances website (link), are the large French cohort in the general reference population for which the CASD provides secure bubbles for data management and analysis processing.
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other News
20 November 2025
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A researcher at Institut national d’études démographiques (INED), Louise Caron conducts extensive research on international immigration issues.
18 November 2025
Producers Committee met on November 13 and the Scientific Council on November 18.
17 November 2025
CASD was one of the organizations consulted for the drafting of this report. [Read the report]
5 November 2025
Written in collaboration with the IPP, it is based on the matching of data stored on CASD. [Read the report (in french]
1 November 2025
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This workshop aims to stimulate specific actions on seismic risk analysis and management, and in particular to present the available data.





