[ggm]

Thats a revision of a paper with roots back to 2006. I applaud them for having a rich source, but the primary objections can be understood to be in their apologia:

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.' This wording was open to misinterpretation, for which we apologize. While scientific evidence is never immune to misinterpretation, we take responsibility for not making the wording clearer from the outset. We are engaging with the review authors with the aim of updating the Plain Language Summary and abstract to make clear that the review looked at whether interventions to promote mask wearing help to slow the spread of respiratory viruses.

The problem was how they communicated. The data is the data.