DENVER (AP) — Seasonal colds and the flu spread through NFL locker rooms just about every year, sending some players home sick while others slog through practices hoping they'll feel better by game day.

Last December, the Patriots flew two airplanes to Houston to keep the healthy players apart from sick ones, which included seven starters. On the final weekend of the 2016 season, the Raiders were ravaged by a bug that swept through their entire roster and waylaid hopes of a deep playoff run.

Now, teams have COVID-19 to worry about.

Offseason workout programs have been entirely virtual since th...