General Discussion
In reply to the discussion: So, what's the DU consensus re: Mask, no-mask? [View all]dpibel
(3,487 posts)The pooled case‐control studies, which focused on the SARS coronavirus (SARS CoV), suggest that implementing barriers to transmission, isolation and hygienic measures are effective with the use of relatively cheap interventions to contain respiratory virus epidemics. We found limited evidence of the superior effectiveness of devices such as the N95 respirator over simple surgical masks. This evidence is supported by a high quality hospital‐based trial (Loeb 2009) which reports non‐inferiority between face barriers. Overall masks were the best performing intervention across populations, settings and threats. More expensive and uncomfortable (especially if worn for long periods) than simple surgical masks, N95 respirators may be useful in very high‐risk situations but additional studies are required to define these situations.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6993921/