Masks and respirators for prevention of respiratory infections: a state of the science review
2024/05/22 by Trisha Greenhalgh, C. Raina MacIntyre, Michael G. Baker +10 · 9 voices · 33 citations
Medicine · Mathematics · #Infection Control and Ventilation #COVID-19 and healthcare impacts #COVID-19 epidemiological studies
paper · doi:10.1128/cmr.00124-23
Abstract
SUMMARYThis narrative review and meta-analysis summarizes a broad evidence base on the benefits-and also the practicalities, disbenefits, harms and personal, sociocultural and environmental impacts-of masks and masking. Our synthesis of evidence from over 100 published reviews and selected primary studies, including re-analyzing contested meta-analyses of key clinical trials, produced seven key findings. First, there is strong and consistent evidence for airborne transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and other respiratory pathogens. Second, masks are, if correctly and consistently worn, effective in reducing transmission of respiratory diseases and show a dose-response effect. Third, respirators are significantly more effective than medical or cloth masks. Fourth, mask mandates are, overall, effective in reducing community transmission of respiratory pathogens. Fifth, masks are important sociocultural symbols; non-adherence to masking is sometimes linked to political and ideological beliefs and to widely circulated mis- or disinformation. Sixth, while there is much evidence that masks are not generally harmful to the general population, masking may be relatively contraindicated in individuals with certain medical conditions, who may require exemption. Furthermore, certain groups (notably D/deaf people) are disadvantaged when others are masked. Finally, there are risks to the environment from single-use masks and respirators. We propose an agenda for future research, including improved characterization of the situations in which masking should be recommended or mandated; attention to comfort and acceptability; generalized and disability-focused communication support in settings where masks are worn; and development and testing of novel materials and designs for improved filtration, breathability, and environmental impact.
Citations
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Discussions
- Oh, and if you want to read about the reality of masks and airborne transmission, look no further than this... doi.org/10.1128/cmr.... [bsky, 97 points, 3 comments]
- thanks to the authors @trishgreenhalgh.bsky.social @dfisman.bsky.social @globalbiosec (X) @jvipondmd.bsky.social @sameo416.bsky.social @dalupton.bsky.social @mark-ungrin.bsky.social S. Bhatta [bsky, 31 points, 3 comments]
- Als neuerer Review zu Masken ist übrigens das hier empfehlenswert. Aus dem Abstract: "Third, respirators are significantly more effective than medical or cloth masks." doi.org/10.1128/cmr.... [bsky, 17 points, 0 comments]
- I see your video, and raise you an overview of research that validates masks as an effective way to reduce the spread of airborne contagions.❤️ Clinical Microbiology Reviews, 5/22/2024 Masks & respir [bsky, 9 points, 0 comments]
- Do you know this formidable publication? 👇✨️ doi.org/10.1128/cmr.... [bsky, 2 points, 0 comments]
- From @trishgreenhalgh.bsky.social et al. doi.org/10.1128/cmr.... [bsky, 1 points, 1 comments]
- A striking statistic, wording from doi.org/10.1128/cmr.00124-23 “Wang et al. noted early in 2020 that the adjusted odds of occupational acquisition of SARS-CoV-2 was over 400 times lower (lower-bound [bsky, 1 points, 1 comments]
- We already knew it, but since good science is somehow controversial here’s a new review with a clear conclusion that good respirators do actually work. doi.org/10.1128/cmr.... [bsky, 0 points, 1 comments]
- doi.org/10.1128/cmr.... [bsky, 0 points, 0 comments]
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