Jordan Pickford is in self-isolation along with the entire Everton squad after a player reported symptoms.
The former Sunderland keeper has been forced to stay home as a precautionary measure with all players and staff self-isolating.
The training ground, Goodison Park and corporate headquarters at the Royal Liver Building all closed.
A club statement read: “Everton Football Club can confirm that, as a precautionary measure, its entire first-team squad and coaching staff are undertaking a period of self-isolation following medical advice.
“The step has been taken after a first-team player reported symptoms consistent with coronavirus."
A spokesperson added: “The club is in regular contact with the player in question and is monitoring the wellbeing of all players and staff.
“The health, welfare and safety of all Everton players, staff and stakeholders is the club’s absolute priority.
“Therefore, the club has taken the decision to close down all Everton workplaces including USM Finch Farm, Goodison Park and its headquarters at the Royal Liver Building in Liverpool City Centre.
“The club’s retail store at Goodison Park will also close but its Liverpool ONE store is unaffected and will remain open.”
The Premier League will also be holding an emergency meeting on Friday after Arsenal's Mikel Arteta and Chelsea's Callum Hudson-Odoi tested positive for the virus.
Reports suggest that the competition is likely to be suspended.
