To answer your last two questions:

No. They can't. Because their fearless leader has them in a trance. And they still believe their "god,' will save them in the end. These people are brainwashed, by Trump, by religion and their own ignorance. I got vaccinated long ago and need to get boosted. I carry my vaccination card with me in my wallet. I can't get a Uber, train, bus or plane without it, like my AMEX card, for Pete's sake. It drives me nuts.