“As a nurse, there are just times when it’s very intuitive. You just sense that something catastrophic is going to happen.” Bonnie Castillo, the executive director of National Nurses United In early January, before most…

Shelly Hughes’s typical day starts at 9 p.m. She’s used to not wanting to get out of bed and go to work, but now the feeling is much stronger. Her son, home from college because…