October 13, 2020
PLOS One
University of Sydney (Australia)
“Background: In this large-scale cluster-randomized controlled trial (cRCT) we sought to assess the effectiveness of facemasks against viral respiratory infections.
Method and results: … By intention-to-treat analysis, facemask use did not seem to be effective against laboratory-confirmed viral respiratory infections… nor against clinical respiratory infection.”
© 2020 Alfelali et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited."
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mandates,masks