Birdwatch Note Rating
        2023-03-06 13:51:39 UTC - HELPFUL
        Rated by Participant: 5614EBA5386AA534D2E982EC84146821FEBF947084FA80A3819F5FB1A8EC41F6 
        Participant Details
        
        Original Note:
        The highest quality RCT evidence currently suggest no effect of masking on transmission of respiratory viruses, whether face masks or N95s are used    https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD006207.pub6/full    Mechanistic studies cannot determine effectiveness, and N95s do not block all viral particles from the user. 
        All Note Details