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Updated: Oct 10, 2025

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Assessing effective mask use by the public in two countries: an observational study

Clare L Atzema1,2,3, Ivona Mostarac4, Dana Button5

  • 1Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada clare.atzema@ices.on.ca.

BMJ Open
|December 10, 2021
PubMed
Summary

Mask mandates significantly increased mask-wearing during COVID-19. While some improper use occurred, mask wearers had fewer disease transmission opportunities, highlighting the need for targeted public health interventions for the elderly and transit users.

Keywords:
COVID-19health policypublic health

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