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Concerns about the coronavirus will prevent coaches from recruiting players for the next four weeks, the NCAA announced Friday:

CBS Sports' Jon Rothstein first reported the news.

The coronavirus pandemic has already forced the NCAA to cancel all remaining winter and spring championships, including the men's and women's basketball tournaments.

A number of colleges have either canceled or postponed their pro days for players to work out in front of NFL scouts leading up to the draft April 23. Michigan and Penn State canceled their pro days, scheduled for Friday and Tuesday, respectively.

Per ESPN's Field Yates, the University of Alabama is prohibiting any NFL personnel from visiting the school until March 30 and rescheduled its pro day from March 24 to April 9.

Under official NCAA rules, March 1-April 14 is a "quiet period" in FBS recruiting. Men's college basketball normally has an open recruiting period through March 31 (aside from a Dec. 24-26 "dead period"), followed by a quiet period April 1 and dead period April 2-9.