Effectiveness of Adding a Mask Recommendation to Other Public Health Measures to Prevent SARS-CoV-2 Infection in Danish Mask Wearers : A Randomized Controlled Trial
OPEN Annals of internal medicine | 19 Nov 2020
H Bundgaard, JS Bundgaard, DET Raaschou-Pedersen, C von Buchwald, T Todsen, JB Norsk, MM Pries-Heje, CR Vissing, PB Nielsen, UC Winsløw, K Fogh, R Hasselbalch, JH Kristensen, A Ringgaard, M Porsborg Andersen, NB Goecke, R Trebbien, K Skovgaard, T Benfield, H Ullum, C Torp-Pedersen and K Iversen
Observational evidence suggests that mask wearing mitigates transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It is uncertain if this observed association arises through protection of uninfected wearers (protective effect), via reduced transmission from infected mask wearers (source control), or both.
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