Originally Posted by BigFurry

Countries with Early Adoption of Face Masks Showed Modest COVID-19 Infection Rates

In “COVID-19 and Public Interest in Face Mask Use,” researchers from the Chinese University of Hong Kong shared findings from their analysis of how public interest in face masks may have affected the severity of COVID-19 epidemics and potentially contained the outbreak in 42 countries in 6 continents.
https://www.thoracic.org/about/newsr...tion-rates.php


Mask test with disposable mask: https://i.insider.com/5efcc0e35af6cc...eg&aut o=webp
Another: https://ibb.co/hf6nXPy
Full article: https://www.insider.com/microbiologi...navirus-2020-7


Simple aerosol mask test video with different masks - shows that even cheap disposable SURGICAL masks have a big effect: https://imgur.com/CIT9q9y

Will they filter 100%? No. Will they stop big water droplets from reaching other people? Yes.