Los Angeles emergency room nurse Sandra Younan spent the last year juggling long hours as she watched many patients struggle with the coronavirus and some die.

Then there were the patients who claimed the virus was fake or coughed in her face, ignoring mask rules. One man stormed out of the hospital after a positive COVID-19 test, refusing to believe it was accurate.

"You have patients that are literally dying, and then you have patients that are denying the disease," she said. "You try to educate and you try to educate, but then you just hit a wall."

Bogus claims about the virus, masks and va...