[RWebb]

Originally Posted by fintstone

No. There are no studies that show that wearing cloth masks prevent the spread among anyone.

Most are like the study cited by the OP. They make some assumptions (guesses) and apply them to a model that uses a physics equation. It doesn't study/show a single person who got the disease or didn't. It did not study the transmission between people. It only studied a physics model.

sad you don't "believe in" physics

but you are wrong in your 1st paragraph:

https://www.healthaffairs.org/doi/10.1377/hlthaff.2020.00818

https://www.researchgate.net/publication/342198360_Association_of_country-wide_coronavirus_mortality_with_demographics_testi ng_lockdowns_and_public_wearing_of_masks_Update_Ju ne_15_2020


there are also a number of laboratory studies:

https://www.nejm.org/doi/full/10.1056/NEJMc2007800

https://www.nature.com/articles/s41591-020-0843-2#Sec3