An outbreak of the Norovirus winter vomiting bug at a holiday village, which affected over 100 guests, has cost the company at least £250,000.
Potters Resort at Hopton-on-Sea near Great Yarmouth closed on Monday after a number of cases the previous week.
The resort has undergone midweek cleaning and reopened to 750 guests on Friday afternoon.
Potters said the costs were a combination of lost trade and the clean-up operation.