I was a high school teacher for over twenty years, and I worked in a public school and special schools for at-risk kids. During my teaching career I got lice, pink eye, the flu (Not the ones I got the shot for.), strep, and was bitten, spit on, punched, and tripped. I was hospitalized once because of a flag football game. So the possiblity of illness or injury comes with this career even without the coronavirus. If teachers have health issues that increase their risk beyond a determined acceptable point they'll have to stay home, but the rest have to mask up and get back to the classroom and TEACH.
Colleen D on this board is absolutely right. For someone to say that "black lives matter" and then stand back and let the educational disparities for minorities get wider and wider is insane. Kids of any race that are in poverty will regress because they need A TEACHER not a screen, if their mom isn't a college professor. It's called "making a sacrifice for the community". Put up or shut up.