I don't know French but here are some sources that disagree: CDC: https://www.cdc.gov/coronavirus/2019-ncov/downloads/2019-ncov-factsheet.pdf https://www.cdc.g

I don't know French but here are some sources that disagree: CDC: https://www.cdc.gov/coronavirus/2019-ncov/downloads/2019-ncov-factsheet.pdf https://www.cdc.gov/coronavirus/2019-ncov/downloads/2019-nco... WHO: https://www.who.int/news-room/commentaries/detail/modes-of-transmission-of-virus-causing-covid-19-implications-for-ipc-precaution-recommendations https://www.who.int/news-room/commentaries/detail/modes-of-t... Harvard Medical School: https://www.health.harvard.edu/diseases-and-conditions/preventing-the-spread-of-the-coronavirus https://www.health.harvard.edu/diseases-and-conditions/preve... BC CDC: http://www.bccdc.ca/health-info/diseases-conditions/covid-19/about-covid-19/how-it-spreads http://www.bccdc.ca/health-info/diseases-conditions/covid-19... UC Davis: https://health.ucdavis.edu/coronavirus/covid-19-transmission/index.html https://health.ucdavis.edu/coronavirus/covid-19-transmission... There are plenty more; I think it's clear that "pretty much" every epidemiologist agrees masks are important, even if it's not absolutely everyone.