How to weigh the risk of going out in the coronavirus pandemic, in one chart

Since coronavirus lockdowns began in the US, most Americans have drastically changed their patterns: following instructions to stay home, limiting almost all contact with others, and venturing out only for essential trips and exercise.

As states begin to ease social distancing restrictions, people are beginning to have more options. Between those wanting to patronize newly reopened businesses or socialize in person, and more employers calling people back to work, survey and cellphone data suggests people are already starting to trickle out of their homes.

But for many people, it’s really...