Scientific background

For further information, please refer to the following scientific papers:​

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• Respiratory virus shedding in exhaled breath and efficacy of face masks (English)

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• Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2 (English)

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• Strömungsanalysen zur SARS-CoV-2 Schutzmaskendebatte (German)

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• Efficacy of masks and face coverings in controlling outward aerosol particle emission from expiratory activities (English)​

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• COVID-19: mask efficacy is dependent on both fabric and fit (English)