Desperate to save its pandemic-delayed football season last fall, the Pac-12 made a wager. Rapid antigen tests — a new technology for detecting the coronavirus — had hit the market in recent months, offering results in 15 minutes. The Pac-12, and other athletic conferences, wanted to try an unproven use: to screen healthy athletes daily for the coronavirus.

Desperate to save its pandemic-delayed football season last fall, the Pac-12 made a wager. Rapid antigen tests — a new technology for detecting the coronavirus — had hit the market in recent months, offering results in 15 minutes. The Pac-12, and other athletic conferences, wanted to try an unproven use: to screen healthy athletes daily for the coronavirus.