Gesichtsmasken Benutzung
National Library of Medicine:- 2005 Public Health Strategy and the Police Powers of the State[link1]
- 2009 Face Mask Use and Control of Respiratory Virus Transmission in Households[link2]
Vgl.: https://piped.kavin.rocks/watch?v=mWO7U0CSPRU
- [link1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2569983/
- [link2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2662657/