At Kevin Smith's home health care agency in Massachusetts, only 52% of his 400 staff members have been vaccinated. He'd like to order them all to get the shot, but he says he can't risk a mass exodus.

It's a legitimate fear. The labor market is very tight, with a record number of job openings and not enough job candidates. And among unvaccinated workers asked what they would do if their employer instituted a mandate, 50% said they'd leave their job, according to a June survey by health policy think tank KFF. READ MORE