Or just keep yourself safe, instead of demanding everyone else keep you safe.New England Journal of Medicine
Visualizing Speech-Generated Oral Fluid Droplets with Laser Light Scattering
Why face masks matter. 42 second video.
https://videos-fms.jwpsrv.com/conte...1d_0xf99979e9a4a8ac7c27ea0239de0c3abcaf7f8518
Edit: some random spots on a video where you cannot even see what is causing them. LOL