"Our confidence in these results is generally low to moderate for the subjective outcomes related to respiratory illness, but moderate for the more precisely defined laboratory-confirmed respiratory virus infection, related to masks and N95/P2 respirators. The results might change when further evidence becomes available. Relatively low numbers of people followed the guidance about wearing masks or about hand hygiene, which may have affected the results of the studies. "
Yeah… They are not really confident about their results… You can find studies that show effectiveness of the mask in a few clics : https://elischolar.library.yale.edu/egcenter-discussion-paper-series/1086/
Soooo, I will continue to think that the mask is effective against viruses spreading by air. Knowing that n95/P2 masks protect mostly the person who wear them and surgical masks protect mostly people from the wearer.
They plan to do it. https://www.lemonde.fr/en/france/article/2023/09/05/uniform-or-standard-outfit-details-of-experiment-in-french-schools-to-be-unveiled-in-the-fall_6124790_7.html