Visitors to Lynn’s Queen Elizabeth Hospital have been urged not to bring pre-prepared food to the site in a bid to contain an outbreak of norovirus.
Two wards and a bay remain closed as efforts to contain cases of the bug continued, although officials have not said how many patients are affected.
And people who have had symptoms of vomiting and diarrhoea within the last 48 hours have been told to stay away from the hospital altogether.
Details of the outbreak were first revealed on Tuesday.
Initially, it was stated that three patients were being treated for the infection.
But officials now say they cannot confirm how many people are being treated for the virus, as not every patient who shows symptoms of it is tested for it.
Dr Ian Hosein, the hospital’s interim associate medical director for infection prevention and control, said: “This indicates a second surge and it is important to emphasise that this is principally a food- borne infection.
“I would ask visitors not to bring self-prepared food items into hospital as these items could be contaminated and put patients at risk of getting norovirus infection.
“This can result in ward closure which puts the hospital under further pressure.”