Over the last three days 1,014 players and staff from all 24 Championship clubs have been tested for the virus.
The EFL have confirmed that two people from one club have tested positive – but the governing body did not confirm which club it is or whether they are part of the playing staff.
Following the EFL statement, Hull City announced that the two positive tests were from their club.
The statement read: "Medical confidentiality means the names will not be disclosed, and the club asks for this to be respected.
"The duo, who are both asymptomatic and feeling no ill effects, will now self-isolate for seven days – in line with the protocols set out in EFL guidelines – before being tested again at a later date.
"The club will continue to liaise closely with the affected personnel and will make no further comment."
Albion are set to return to training tomorrow under phase one of the EFL plan, which will see groups of four or five work together while social distancing.
None of their players or staff tested positive and they will all be allowed to return to the training ground, which had previously been partially open to allow players to train alone. Testing will now continue twice a week.