Are Face Masks Effective? The Evidence.

An overview of the current evidence regarding the effectiveness of face masks.

Aisle C

Published: July 30, 2020; Updated: August 14, 2020
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An overview of the current evidence regarding the effectiveness of face masks.

1. Studies on the effectiveness of face masks

So far, most studies found little to no evidence for the effectiveness of cloth face masks in the general population, neither as personal protective equipment nor as a source control.

1. A May 2020 meta-study on pandemic influenza published by the US CDC found that face masks had no effect, neither as personal protective equipment nor as a source control. (Source)
2. A July 2020 review by the Oxford Centre for Evidence-Based Medince found that there is no evidence for the effectiveness of cloth masks against virus infection or transmission. (Source)
3. A Covid-19 cross-country study by the University of East Anglia found that a mask requirement was of no benefit and could even…

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