Jurgen Klopp says a Covid outbreak that led to the postponement of Liverpool's Carabao Cup semi-final first leg at Arsenal had "a lot of false positives".
However, Klopp says defender Trent Alexander-Arnold is the only player to actually test positive.
Anyone with a false positive result was still unavailable for Sunday's FA Cup third-round tie against Shrewsbury.
Klopp named four teenagers in his starting line-up with one of those - Kaide Gordon - scoring the equaliser as the Merseyside club came from behind to win 4-1.
"This was the team we could line up with today and the boys did really well," said the Reds boss.