The Hornets were forced to close their training ground on Wednesday with Craig Cathcart, Ross Jenkins, Henri Lansbury, Don Cowie and Will Hoskins all laid low.
Cathcart and Jenkins missed Tuesday night's 3-2 defeat by Coventry, Lansbury was only well enough to make the bench and Hoskins and Cowie had to leave the action in the second half.
But all five have returned to training and will be in contention at the weekend.
Lee Hodson, who suffered a leg injury against the Sky Blues, should also be fit and Nathan Ellington is back from suspension so Heidar Helguson (calf) and Jay DeMerit (eye) are the only definite absentees.
