The company is distributing enough tests for employees to take them three times per week, typically on Monday, Wednesday and Friday mornings. Soon, Citigroup will expand the program to all 6,000 of its U.S. bank branches. The goal, Zimmerman said, is to help people learn that they have Covid before they can infect colleagues or customers.

This is the kind of ambitious testing program that many medical experts believe should be available across the country. Why? Even as more Americans are receiving vaccine shots, the country remains months away from vaccination being the norm. In the meantime, wide-scale testing can allow life to begin returning to normal — without setting off deadly new Covid outbreaks.

Unfortunately, the U.S. is going in the opposite direction on testing. The number of daily tests has declined 35 percent since mid-January…