RT @TracyBethHoeg
@NEJM Aso, the @CDCgov knew better a long time ago, but they refused to publish data in their journal @CDCMMWR that failed to find an effect of masks even if it was an improved and expanded analysis of their previous publication!
See my work w/@AChandra_TO here
https://www.sciencedirect.com/science/article/pii/S0163445322005503