COVID-19’s very unequal toll

The COVID-19 pandemic is a horrible human tragedy whose global toll is continuing to rise, but it’s also an exercise in collecting and examining data for clues to how it is spreading.
The numbers change minute-by-minute but suggest that in America your chances of being infected may depend on where you stand on the economic ladder, how closely you live and work in the company of others, and how diligently you and your neighbors take precautions.
Take, for example, the startling contrast bet