Noroviruses are highly contagious and are transmitted via the faeces and vomit of infected people, either through direct contact or through contaminated objects or via food and water.
The main symptoms of infection with norovirus are diarrhoea,
stomach pain and vomiting. The incubation period is one to three
days. Infection can occur at all ages, with young children and the
elderly particularly at risk from dehydration after
Outbreaks are best controlled by strict hygiene measures to
prevent further spread of the virus. Currently there are no drugs
that can control or prevent infection by norovirus.