Want a reason to support unions? A union may help keep you alive.

Your chances of surviving a hospital stay after a myocardial infarction—also known as a heart attack—are higher if your nurses are in a union than if they’re not.

That’s the conclusion of a study by academics at the University of Massachusetts and the University of California. It’s also part of a much larger picture that the media ignore, that might give even right-wing Republicans a reason to support unions, and that makes the latest U.S. Bureau of Labor Statistics evidence of a dwindling union presence bad news for all of us.