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University of Nebraska Medical Center

Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers

(Annals of Internal Medicine)

Background:

It is uncertain if medical masks offer similar protection against COVID-19 compared with N95 respirators.

Objective:

To determine whether medical masks are noninferior to N95 respirators to prevent COVID-19 in health care workers providing routine care.

Design:

Multicenter, randomized, noninferiority trial. (ClinicalTrials.gov: NCT04296643).

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