very good article in french sorry the lnk : https://www.letemps.ch/sciences/dix-enigmes-scientifiques-resoudre-covid19?fbclid=IwAR0JmhfK0PYS3MI-VQAZqJqvcjaL8HoNElzBedixI7H4iDFjjFSggsD6oE8

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