More than 750,000 people could be affected by norovirus

The Health Protection Agency (HPA) has warned that for every confirmed case of the stomach bug, there are likely to be a further 288 unreported sufferers.

There have been 2,630 confirmed cases so far this season, meaning that the real number could be 757,440.

A spokesperson for the HPA said: "Laboratory confirmed reports represent only a small proportion of the actual amount of norovirus activity in the community, because the vast majority of affected people do not access health care services as a result of their illness."

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Norovirus cases up 83%

The number of confirmed cases of norovirus is 83% higher than last season, according to the latest figures from the Health Protection Agency (HPA).