Repeating an assertion that has absolutely no evidence to support it, doesn’t make it true. A lie is still a lie. The protests simply further exposed the lie, though the media and politicians will never admit it.
Theory is that air systems in schools, restaurants, public places can spread the virus. Someone has already made filters and also something like a light scan you go through.
I love how protesters get a pass in the media, about not being selfish as they wear masks. But, they don’t maintain that 6 ft social distancing that we are mandated to do. Shoulder to shoulder, screaming in peoples faces through their mask not an inch from that person. Oh and you are to watch “not to scream, talk loudly” to help not spread COVID as well.
Tell me how much you know about first order differential equations because the issue is illustrated with a simple math problem, the same math that keeps reactors safe and makes nuclear bombs explode.