If you can’t provide links to sources, THEN YOU DON’T HAVE ANY SOURCES, and your comments don’t provide any proof.
I can always provide links to my sources.
“If you can’t provide links to sources, THEN YOU DON’T HAVE ANY SOURCES, and your comments don’t provide any proof.”
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Here are my sources:
Visualization shows exactly how face masks stop COVID-19 transmission:
https://www.livescience.com/face-mask-visualization-droplets-covid-19.html
Aerosol Filtration Efficiency of Common Fabrics Used in Respiratory Cloth Masks:
https://pubs.acs.org/doi/10.1021/acsnano.0c03252
Stability and infectivity of coronaviruses in inanimate environments:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7190947/
Dynamics of infectious disease transmission by inhalable respiratory droplets:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894888/
Face Masks Considerably Reduce COVID-19 Cases in Germany:A Synthetic Control Method Approach:
http://ftp.iza.org/dp13319.pdf
Physical distancing, face masks, and eye protection to prevent person-to-person transmission of SARS-CoV-2 and COVID-19: a systematic review and meta-analysis:
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31142-9/fulltext
Respiratory virus shedding in exhaled breath and efficacy of face masks:
https://www.nature.com/articles/s41591-020-0843-2
A rapid systematic review of the efficacy of face masks and respirators against coronaviruses:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191274/