| Hans-Günter Meyer-Thompson | Fachartikel
WHO. Coronavirus disease (COVID-19) advice for the public: When and how to use masks
WHO. Coronavirus disease (COVID-19) advice for the public: When and how to use masks
These materials are regularly updated based on new scientific findings as the epidemic evolves. Last updated 5 June 2020
https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public/when-and-how-to-use-masks