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Disease

Norovirus

Page last updated on 06 June 2022

Norovirus is a highly contagious viral disease that causes diarrhoea, vomiting, nausea and stomach pain. Other common names used for gastroenteritis due to Norovirus are ‘gastric flu’, ‘winter vomitting’ and ‘viral gastro’.

 

Key disease information

What is norovirus?

Noroviruses are a group of contagious viruses that cause gastroenteritis. Norovirus affects millions of people globally each year. There are many different types of noroviruses, and infection with one type won’t necessarily protect you from infection by another type. 

How is norovirus spread?

Norovirus spreads very easily and quickly. The virus is shed in faeces and vomit, which can inadvertently make their way to your mouth and infect youYou can accidentally ingest the virus by touching contaminated surfaces or objects and putting your fingers in your mouth, by eating food or drinking liquids that are contaminated, or by having direct contact with someone who is infected with norovirus.

Is norovirus contagious?

Yes, norovirus is very contagious. A person with norovirus is most contagious when they have symptoms and for a few days after they have recovered.  If you get norovirus, you can shed billions of virus particles in your faeces or vomit. It only takes a few viral particles to make others sick. 

What are the symptoms of norovirus?

The usual symptoms of norovirus infection are diarrhoea, vomiting, nausea and stomach pain. Other symptoms include fever, headache and body aches and pains. Symptoms usually appear about 24 to 48 hours after you have contracted the virus – but can appear earlier in some cases.

How can norovirus be prevented?

If you want to avoid catching norovirus, there are some things you can do. Always wash your hands well before preparing and eating food, after using the bathroom or changing nappies, and after touching surfaces that other people have touched.  Wash fruit & vegetables before consuming.

Iyou do happen to catch norovirus, you can help prevent the spread of disease by practicing good hygiene such as washing your hands well, ensuring surfaces are regularly disinfected, and by making sure contaminated items are laundered. You should avoid public places and contact with others when you are unwell, and for a few days after you have recovered as you are still likely to be contagious.

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Sources & Citations

  1. Qld Health Norovirus Fact sheet. April 2018.  http://conditions.health.qld.gov.au/HealthCondition/condition/14/217/484/Norovirus (Accessed May 2022
  2. Centers for Disease Control and Prevention. About Norovirus.  https://www.cdc.gov/norovirus/about/index.html  (Accessed May 2022)
  3. Centers for Disease Control and Prevention. Norovirus Worldwide.  https://www.cdc.gov/norovirus/trends-outbreaks/worldwide.html  (Accessed May 2022)
  4. NSW Health. Norovirus Fact sheet. May 2018.  https://www.health.nsw.gov.au/Infectious/factsheets/Factsheets/norovirus.pdf (Accessed May 2022)
  5. Centers for Disease Control and Prevention. Norovirus Transmission.  https://www.cdc.gov/norovirus/about/transmission.html  (Accessed May 2022)

MAT-AU-2201641  Date of preparation May 2022