Feb 14, 2023 · Now, a new scientific review suggests that widespread masking may have done little to nothing to curb the transmission of COVID-19. The review, titled "Physical interventions to interrupt or reduce...

Mar 16, 2023 · Three years into the COVID-19 pandemic, few topics have become as polarizing as masks. Some people claim masks are a panacea; others say masks are worthless or worse. The evidence, however,...

This rapid systematic review of evidence asks whether (i) wearing a face mask, (ii) one type of mask over another and (iii) mandatory mask policies can reduce the transmission of SARS-CoV-2 infection, either in community-based or healthcare settings. A search of studies published 1 January 2020–27 January 2023 yielded 5185 unique records.

Jun 30, 2024 · Does wearing a face mask help to prevent COVID? Four years after the pandemic began, here's what scientists have learned.

Feb 10, 2022 · This report describes face mask or respirator effectiveness in helping protect against COVID-19 infection.

Sep 6, 2023 · The study investigators were able to achieve a 42% adoption of surgical mask (medical procedure mask) wearing in the intervention communities versus 13% in the control communities (with ∼180 000 people in each group), which correlated with reductions in seroprevalence. 5

Aug 7, 2021 · Below, find 49 studies (some pending peer review) which show the effectiveness of masking. Researchers (including a CDC doctor) for a February 2021 article published by the Journal of the American...

Nov 13, 2023 · This study examines the association between self-reported face mask use and the risk of infection with SARS-CoV-2 in data obtained from a randomized trial on the effectiveness of using glasses in the community against the risk of infection with SARS-CoV-2.

We compared efficacy of masks (cloth and surgical) and respirators (KN95 and N95) as source control for SARS-CoV-2 viral load in exhaled breath of volunteers with COVID-19 using a controlled human experimental study. Volunteers (N = 44, 43% female) provided paired unmasked and masked breath samples allowing computation of source-control factors.

Empirical studies on mask effectiveness are evaluated with a statistical power analysis that includes the effect of adherence to mask usage protocols.