Why is there any debate on masks?

A cluster randomised trial of cloth masks compared with medical masks in healthcare workers

C Raina MacIntyre, et. al., NIH
h/t Notsothoreau on A♠

Conclusions: This study is the first RCT of cloth masks, and the results caution against the use of cloth masks. This is an important finding to inform occupational health and safety. Moisture retention, reuse of cloth masks and poor filtration may result in increased risk of infection. Further research is needed to inform the widespread use of cloth masks globally. However, as a precautionary measure, cloth masks should not be recommended for HCWs, particularly in high-risk situations, and guidelines need to be updated.


Below c/o MediaFire
h/t Ghost Of Qassem Soleimani on A♠

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