Queensland Health announced that the Royal Brisbane and Woman's (RBWH), Gold Coast and Cairns Base hospitals had been affected by the virus, which causes vomiting, diarrhea, nausea, stomach cramps, fever and headaches.

It is estimated that about 70 staff and patients have fallen ill at the RBWH over the past 10 days, while another 50 have been affected at the Gold Coast Hospital in the past few weeks. The problem has forced the hospitals to reduce activity in a number of wards in a bid to curtail the spread of the virus. In the Cairns Base Hospital, another 25 patients and staff caught the virus over three days last week.

Dr Tony Allworth, RBWH's Infectious Diseases director, said the hospital had diverted admissions away from contagious areas to shield patients, visitors and staff from the virus. "Norovirus is common in the community during winter months," Allworth said. "This virus is being spread around in the general community at the moment, so it is not unique to the RBWH. "We have additional measures in place, such as restricting admissions to affected areas and reducing unnecessary access to the wards, to reduce the chances of it spreading." "We apologize for any inconvenience", he added.

Queensland Health Director of Infection Services, Dr Michael Whitby, said outbreaks usually emerged where a concentrated number of people existed, such as at childcare centers, schools and aged-care facilities.