The UK’s Health Authority has issued a warning after thousands of norovirus cases were detected – 75% more than normal at this time of year. The agency said anyone who contracts the virus should stay at home to stop the spread.

Amy Douglas, norovirus epidemiologist at UKHSA, said: “Norovirus levels were higher than usual for this time of year in April and continue to rise. This is likely due to a combination of factors, but the colder weather we have had will not have helped.

“Norovirus can cause dehydration, especially in vulnerable groups such as young children and the elderly or immunocompromised, so if you get sick it’s important to drink plenty of fluids. If you have diarrhea and vomiting, there are steps you can take to avoid transmitting the infection. Do not return to work, school or daycare until 48 hours after your symptoms have subsided, and do not prepare food for others during this time.”

Norovirus is a highly contagious virus that causes gastroenteritis, an inflammation of the stomach and intestines. Typical symptoms of norovirus include:

1. Nausea : An unpleasant feeling in the stomach, which may be accompanied by an urge to vomit.

2. Vomit Vomiting often occurs suddenly and violently and is a common and noticeable symptom.

3. Diarrhea : Watery and often frequent stools are a sign of a norovirus infection.

4. Stomach cramps : Abdominal pain or cramping may occur, ranging from mild to severe.

5. Mild fever : Some people may experience a slight fever.

6. Muscle pain : General body aches or muscle pains may occur, although this is less common.

7. fatigue : The infection can lead to a general feeling of weakness and tiredness.

8. Headache : Some people may experience headaches during the course of the infection.

Symptoms usually appear 12 to 48 hours after exposure to the virus and usually last 1 to 3 days. In some cases, especially in young children, older adults, and people with weakened immune systems, symptoms may be more severe and last longer.

Norovirus is highly contagious and spreads easily through contaminated food, water, surfaces, and close contact with infected people. Good hygiene practices such as frequent hand washing and proper food handling are crucial to preventing the spread of norovirus.