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That “illness” that kept Bears defensive end out of practice all week will keep him out of Sunday’s game against the Packers.

According to Jay Glazer of FOX Sports, Allen is suffering from pneumonia. He has lost 18 pounds, dropping from 255 to 237.

Allen told Glazer that he has played through plenty of injuries, but that he can’t play through this condition.

It means more reps for Trevor Scott and Willie Young for the home team, as the Bears try to improve to 3-1 overall, and to avoid falling to 0-2 at home.