The complaints offer a snapshot of the fear experienced by the slice of working Americans compelled to work even as the majority have been urged to stay at home, and they come from an array of workplaces: hospitals, construction companies, grocery stores, pharmacies and shipping companies.

For some industries, the way work happens will change forever, long after COVID-19 subsides. With a few notable exceptions, companies across the U.S. are sending millions of employees to set up home offices, not because they can, but because they must. Su