From the cited paper: > The high risk of bias in the trials, variation in outcome measurement, and relatively low adherence with the interventions during the s

From the cited paper: > The high risk of bias in the trials, variation in outcome measurement, and relatively low adherence with the interventions during the studies hampers drawing firm conclusions. Statement from the publishers: https://www.cochrane.org/news/statement-physical-interventions-interrupt-or-reduce-spread-respiratory-viruses-review https://www.cochrane.org/news/statement-physical-interventio... > The original Plain Language Summary for this review stated that 'We are uncertain whether wearing masks or N95/P2 respirators helps to slow the spread of respiratory viruses based on the studies we assessed.'