The events at Atlanta Motor Speedway and Homestead-Miami Speedway will be restricted to competitors, crews, officials and other necessary personnel to conduct the race.
NASCAR is working with public health officials to determine future scheduling beyond those events.
Major League Baseball is likely to cancel the rest of its spring training game schedule due to the coronavirus. MLB probably will also announce that the start of the season will be delayed, according to people familiar with the discussions.
The people spoke to The Associated Press on condition of anonymity because no decision had been announced. They said Commissioner Rob Manfred planned a conference call with his executive council Thursday to discuss the situation and then a call with team owners.
MLB had continued to play into Thursday, when Florida Gov. Ron DeSantis said he strongly recommended to local authorities and organizers that they limit all mass gatherings.
The major league season had been scheduled to start March 26, its earliest opening other than for international games.
Meanwhile, the NHL is following the NBA’s lead and suspending its season.
NHL Commissioner Gary Bettman announced the pause of the season amid concerns about the new coronavirus. The NBA announced Wednesday night it was suspending play, after a player tested positive for COVID-19.
Several NBA and NHL teams share arenas.
The NHL has not said any player has tested positive for COVID-19. The league is halting play with 189 games left in the regular season, sparking uncertainty about how many more, if any, could be played before the playoffs.
Bettman said the NHL has tried to follow mandates of health experts and local authorities without taking premature or unnecessary measures." Bettman's statement said the NBA's news made it “no longer appropriate to try to continue to play games at this time.”