The NHS has issued an urgent warning as cases of norovirus, commonly known as the “winter vomiting bug,” have surged to levels significantly higher than usual in England. This highly contagious virus primarily causes two intense symptoms—vomiting and diarrhoea—that typically last around 48 hours.
Norovirus spreads rapidly through contact with contaminated faeces, contaminated surfaces, or close contact with infected individuals. It can also be transmitted through contaminated food or water. The NHS urges vigilant handwashing and hygiene practices to reduce the risk of infection.
Recent data from the UK Health Security Agency (UKHSA) revealed a 124.2% increase in laboratory-confirmed norovirus cases between late May and late June 2025 compared to the five-season average for the same period. Although there has been a recent decline, the virus remains prevalent.
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Symptoms of norovirus strike suddenly and include nausea, vomiting, diarrhoea, high temperature, headaches, stomach cramps, and general body aches. Despite these unpleasant signs, the illness usually resolves within two to three days. The NHS recommends resting at home and prioritising hydration with plenty of fluids to avoid dehydration, especially in warm weather.
To prevent further spread, individuals experiencing symptoms should avoid attending school, work, hospitals, or care homes until at least 48 hours after symptoms subside. If diarrhoea persists for more than seven days or vomiting lasts beyond two days, contacting NHS 111 is advised.
By maintaining strict hygiene standards and self-isolating when symptomatic, the spread of norovirus can be effectively limited.