• By Lolita Lopez and Samantha Tata, NBCLosAngeles.com

    Nearly a third of the students at Medea Creek Middle School in Oak Park, Calif., have missed class since last Thursday as a highly contagious gastrointestinal virus makes its way around the school.

    Parent Melinda Pittler carries a bottle of waterless hand sanitizer with her wherever she goes. She and other parents at the Oak Park school started carrying the germ-killing liquid since the norovirus began spreading through the school last week.

  • Posted: January 31, 2012

    Chapel Hill, N.C. — Health departments across North Carolina have reported norovirus outbreaks in recent weeks, prompting state public health officials to issue an alert Tuesday.

    The state Division of Public Health doesn't track norovirus, so officials don't have specific numbers of people sickened by the gastro-intestinal bugs. They said, however, that eight counties have reported outbreaks, including Wake, Orange, Alamance and Pitt.

  • Wednesday December 5 2012

    Many newspapers are reporting on the Health Protection Agency’s latest figures on the ongoing outbreak of norovirus – the so-called winter vomiting disease. The data suggest that cases of the virus, which are usually highest after Christmas, are high for this time of year.

  • JEREMY LAURANCE - Friday 28 December 2012

    More than one million people have been infected with norovirus, the winter vomiting bug, according to latest figures.

    The Health Protection Agency today said there have been 3,538 laboratory confirmed cases since the summer, an 83 per cent rise on the same period last year.

  • Monday 02 January 2012

    With the latest figures suggesting that up to 1.12 million people could be affected by an outbreak of norovirus in the UK, Channel 4 News looks at the virus and why it is so contagious.

    What are the symptoms of norovirus?

    Noroviruses are the most common cause of stomach bugs, or gastroenteritis, in the UK.

  • EIGHT wards at Warwick Hospital are closed to visitors due to another outbreak of the contagious illness, norovirus.

    The Victoria, Malins, Castle, Nicholas, Charlecote, Guy, Mary and Squire wards are not permitting any visitors, except for in circumstances where the ward manager allows it on the compassionate grounds that the patient is seriously ill. Any visitors who think they fall into this category should call the ward manager to discuss this.

  • CBC News Posted: Feb 5, 2012 2:42 PM ET - Last Updated: Feb 5, 2012 7:19 PM ET

    A stomach virus has stricken people on a third American cruise ship.

    Royal Caribbean's Voyager of the Sea left a couple of hours late on Saturday because of the norovirus outbreak, Port of New Orleans spokesman Chris Bonura said Sunday.

    About 200 passengers became ill with the gastrointestinal illness, which causes vomiting and diarrhea. The company did not immediately return a call and email seeking further details.

  • 24 December 2012 Last updated at 18:59 ET
    "Norovirus is the Ferrari of the virus world," says Professor Ian Goodfellow, a Wellcome Trust fellow, who has been studying the virus for 10 years.

    Commonly known as the Winter vomiting bug, it has caused over 3000 confirmed cases of vomiting and diarrhoea since the Summer in England and Wales.

    For most people it leads to a mild illness and disappears in 2-3 days with no long-lasting effects.

  • 11 January 2013 Last updated at 04:19 ET

    A new strain of norovirus may be the reason for the sharp rise in cases of the vomiting bug this winter.

    The Health Protection Agency has done tests which show there is a new variant called Sydney 2012 which has become the dominant strain in England and Wales.

    It spreads quickly because people are less immune to it.