Harrison said: “We've been really unfortunate this season with injuries and one thing and another, but it can only help with that mental strength and the fortitude, coming to a crucial part of the season where we need as many points as we can get.
“If we work the way we know we can, we know the methodology works, so getting everyone back will definitely help and hopefully we can get some points."
Midfielder Kalvin Phillips and skipper Liam Cooper have been sidelined with hamstring injuries since early November, while successive ankle, hip and foot problems have restricted leading goalscorer Patrick Bamford to six league appearances.
Harrison said: “This has probably been the worst time honestly, the time with the most amount of injuries. It's tough. The way we train and the way we play, we're bound to get injuries I think.
“It's probably been the toughest time-period that I've ever been faced with, with the amount of injuries.
“But we've shown a lot of promise with guys coming back, so hopefully we can keep everybody fit and stay strong for the rest of the season."
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