Polish Polish Sam Curran returned a negative test for coronavirus.
The 22-year-old suffered an illness problem on Wednesday night during the English national team's preparation game in Southampton.
He has isolated himself in his hotel room and will no longer be part of the game, which ends on Friday.
The Surrey man will be monitored by the team doctor in order to return to training over the weekend.
He will have another coronavirus test on Sunday, along with the rest of the players and team.
England's series of three tests against the West Indies, which begins on Wednesday in Southampton, is being held behind closed doors and in a biosafety environment.
England lives and trains in Southampton as they prepare for the series.
Before Curran fell ill, players and officials underwent a total of 702 tests, all with negative results.
England will reduce its training group from 30 to a test squad of around 20 at the conclusion of the intra-squad match, with the squad's announcement scheduled for Saturday morning.