Did All Those Masks Help with Covid or Not?

The video discusses a Cochrane review on mask efficacy, highlighting its findings and limitations. It clarifies that the review did not conclude masks are ineffective but noted low adherence and high bias in studies. The review suggests surgical masks may have little impact on COVID-19 or flu, while N95 masks might be more effective. The video emphasizes the importance of context, such as healthcare settings versus public spaces, and continuous mask usage. It concludes that while there is uncertainty, good masks can be effective, and their use should be context-dependent.

In what ways might the efficacy of masks differ between healthcare settings and the general public?

What factors could skew the overall results of the review regarding mask effectiveness?