A norovirus outbreak at Auckland Hospital has led to 33 elderly patients being isolated as staff put infection control measures in place.
Auckland District Health Board executive director of nursing Margaret Dotchin this morning confirmed 13 patients and four staff showed symptoms of the virus.
A number of cases of norovirus have been reported recently in other Auckland hospitals and around the country.
The virus spreads easily and causes severe stomach upset, resulting in diarrhoea or vomiting.
Ms Dotchin said the hospital was implementing standard infection control measures to prevent the further spread of the virus to patients and staff.