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. 2021 May 3:1–7. doi: 10.1017/ice.2021.205

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© The Society for Healthcare Epidemiology of America 2021

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means subject to acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Fig. 1. — Weekly face-mask compliance among healthcare personnel from a tertiary-care teaching center in which universal masking was mandated ˜10 weeks prior to the observation period.