Danish Mask Study: No Benefit

Published: November 18, 2020
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The Danish randomized controlled trial on the real-world efficacy of face masks against coronavirus infection – the first of its kind – has now been published in the Annals of Internal Medicine. As expected, the trial found no statistically significant benefit of wearing a face mask. The study used “high-quality surgical masks with a filtration rate of 98%”.

For political reasons, three major journals had previously refused to publish the Danish study.

Meanwhile, US researcher Yinon Weiss has updated his charts on mask mandates and coronavirus infections in various countries and US states. The charts indicate that mask mandates have made no difference, or may even have been counterproductive.

People who want to avoid a coronavirus infection must avoid situations in which they can get infected. If they cannot avoid such situations, and if they belong to a high-risk group, they should discuss prophylactic and early treatment options with their doctor, which according to international studies may reduce the risk of severe disease and hospitalization by up to 90%.

The Danish study: 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. AIM 2020.

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