Here is my current understanding regarding masks and Covid-19. With that said, I'm open to reading about other scientific studies that differ.

https://www.ucdavis.edu/coronavirus/news/your-mask-cuts-own-risk-65-percent

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Transmission by droplets

There are two primary methods of transmission, they said. The first is via droplets a carrier expels, which are about one-third the size of a human hair but still large enough that we can see them. Masks create an effective barrier against droplets.


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Transmission by aerosol particles

The second major transmission method is via the aerosol particles we expel when we talk. Those are about 1/100th the size of a human hair and are more difficult to defend against. Social distancing and staying outdoors, where there is more air flow, are helpful, Blumberg and Ristenpart said.

“Studies in laboratory conditions now show the virus stays alive in aerosol form with a half-life on the scale of hours. It persists in the air,” Ristenpart said. “That’s why you want to be outdoors for any social situations if possible. The good air flow will disperse the virus. If you are indoors, think about opening the windows. You want as much fresh air as possible.”

Remember why, specifically, the Bill of Rights was written...remember its purpose. It was written to limit the power of government over the individual.

There is no believing a liar, even when he speaks the truth.