The winter vomiting outbreak spreading through Britain has led to 45 hospital wards being closed in the last two weeks.
The closures reflect the desire of hospitals to contain an extremely contagious infection.
The Health Protection Agency (HPA) has announced that 1,975 cases have struck in England and Wales since July, a 52% rise on last year.
Outbreaks of norovirus in hospitals can be disruptive and often lead to ward closures.
It is beneficial to try and limit the opportunities for the virus getting into hospitals in the first place.
Everyone can help to minimise the risk of outbreaks at their local hospital by not going if they have the typical symptoms of a norovirus infection.
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