Norovirus: The Most Common Winter Vomiting Bug
Norovirus is one of the most common causes of vomiting and diarrhoea in the UK, especially during the winter months. It’s often referred to as the ‘winter vomiting bug’.
Why is norovirus so contagious?
Norovirus spreads very easily because:
Only a small number of viral particles are needed to cause infection
The virus survives on surfaces for long periods
It spreads quickly in shared environments such as schools, care homes, workplaces and households
Typical symptoms of norovirus
Symptoms usually appear 12–48 hours after exposure and may include:
Sudden vomiting
Watery diarrhoea
Nausea
Stomach pain
Mild fever or aching limbs
Symptoms are often intense but short-lived, with most people improving within 2–3 days.
Managing norovirus safely
There is no specific medication that kills norovirus. Management focuses on:
Hydration – replace lost fluids carefully
Rest – avoid strenuous activity
Good hygiene – wash hands thoroughly with soap and water
People with norovirus should:
Stay off work, school or childcare until 48 hours after symptoms stop
Avoid preparing food for others during this time
Who needs extra care?
Medical advice should be sought if symptoms are severe or prolonged, particularly for:
Babies and young children
Older adults
People with weakened immune systems
Norovirus is unpleasant but usually clears on its own, and most people recover without complications.
More on Winter illnesses…
