The 71-year-old manager is understood to be self-isolating in the north east after returning a positive result following a routine test at the club’s training ground earlier this week.
Middlesbrough are not thought to have recorded any other positive test results among their playing squad, who are training as normal this week in the build-up to their first home game of the season at the Riverside Stadium on Saturday.
Neil Warnock will miss Middlesbrough’s game with Bournemouth after a positive Covid-19 test
Warnock will pick the team, but be restricted to watching the match on television, with assistants Kevin Blackwell and Ronnie Jepson taking charge on match day.
Warnock’s positive test will further raise concerns about the potential for Covid-19 to spread throughout clubs in the EFL following changes to the testing regime.
All Championship clubs were tested weekly last season, but as Sportsmail revealed earlier this week that is no longer mandatory after the EFL altered protocols and some clubs are only testing players after they return from international duty.
As a result Premier League clubs have become concerned about the risk of infection when meeting EFL sides in the Carabao Cup, with at least one top-flight outfit paying for their opponents to have tests before this week’s second-round tie.