Quote Originally Posted by DaveP67 is back! View Post
Right so the university of California

https://www.ucsf.edu/news/2020/06/41...-masks-prevent

And Peer reviewed nature magazine plus numerous scientific papers

https://www.nature.com/articles/d41586-020-02801-8

are wrong and you are correct? Some people still believe in seances and the healing power of crystals so I give up…
The World Health Organisation says: "Masks should be used as part of a comprehensive strategy of measures to suppress transmission and save lives; the use of a mask alone is not sufficient to provide an adequate level of protection against COVID-19.