Danish Mask Study: No Benefit – Swiss Policy Research

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%”.

US researcher Yinon Weiss has meanwhile 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.

Danish Mask Study: No Benefit

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