According to a report in The Athletic, some of the EFL's clubs have complained about the decision and want an investigation into when Liverpool discovered the information, and whether the first leg at the Emirates Stadium, scheduled for January 6, could have gone ahead.
The clubs are reportedly aggrieved that their own requests for postponements due to Covid outbreaks have been turned down by the EFL.
But the EFL is satisfied that Liverpool had legitimate grounds for a delay at the time of their appeal and provided all the necessary evidence, so will resist any calls to examine the circumstances of the outbreak.
Liverpool concurrently tested players and staff with lateral flow device (LFD) tests and PCR tests before the game, and "a rapidly growing number of Covid cases" prompted their request for a postponement.