This is from Chalkbeat NY:
Mayor Bill de Blasio warned on Tuesday that New York City may need a stricter set of restrictions to fight a surge of coronavirus cases shortly after Christmas. He called for an important exception: school buildings.
“Right now we’re seeing extraordinary success in keeping our schools safe,” the mayor said. “I want to keep them open.”
The teachers union — which supported the mayor’s move last week to reopen roughly 850 campuses serving elementary school students and those with the most significant disabilities — cast doubt on that approach.
“If the coronavirus infection rate rises to the point that a citywide ‘shelter in place’ is necessary, keeping school buildings open would be irresponsible,” Michael Mulgrew, president of the United Federation of Teachers, said in a statement.
The strongest word Mulgrew would use is irresponsible. How about dangerous or even deadly?
Schools spread coronavirus. As Austrian professor of microbiology Michael Wagner from the University of Vienna said recently, "Schools are not islands of serenity." Leaving them open is "a significant risk."
As for the advice here: Stay out of any school building you believe is unsafe. Your health is more important than your job. Worry about the job consequences later.