Health authorities in the UK have raised the alarm following a significant increase in norovirus cases. The UK Health Security Agency (UKHSA) reported a 47% rise in infections during the first two weeks of 2026 compared to the preceding fortnight ending December 28, based on their latest surveillance data.
The surge is most noticeable among individuals aged 65 and over, with hospital outbreaks also on the rise. Although current activity remains within expected seasonal ranges, the unpredictable nature of viruses like flu and norovirus means vigilance is critical as trends can shift rapidly.
UKHSA officials emphasize the importance of simple yet effective hygiene practices to help contain the virus. Handwashing with soap and warm water is essential since alcohol-based sanitizers do not eliminate norovirus. Surfaces should be cleaned regularly with bleach-based disinfectants to further reduce transmission.
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Amy Douglas, Lead Epidemiologist at UKHSA, stated: “We are seeing a notable increase in cases, especially among older adults, alongside more hospital outbreaks. While the situation is still within expected levels, people can take straightforward actions to prevent further spread."
Douglas added: “If you experience diarrhea and vomiting, avoid returning to work, school, or nursery until 48 hours after symptoms stop, and refrain from preparing food for others during this period. It’s also best to avoid visiting hospitals and care homes to protect the most vulnerable.”
The NHS notes that norovirus symptoms tend to begin abruptly and include nausea, vomiting, diarrhea, fever, headache, abdominal pain, and muscle aches. Those exhibiting symptoms are advised to stay home until they have been symptom-free for at least two days to prevent contagion.
Meanwhile, UKHSA’s data reveals that cases of flu, COVID-19, and RSV are declining, though these remain within expected levels for the season. Public health officials encourage ongoing preventive measures, such as ensuring good indoor ventilation and wearing face coverings when necessary—particularly around vulnerable individuals—to maintain this downward trend.
Vaccination remains the best defense against severe illness, especially for at-risk groups. The NHS offers free flu vaccinations to seniors, pregnant women, young children, and those with certain health conditions. The RSV vaccine is also available for older adults aged 75 to 79 and pregnant women beyond 28 weeks gestation, helping protect babies after birth.
Dr. Alex Allen, UKHSA Consultant Epidemiologist, remarked: “It’s positive to see flu and RSV cases continue to drop, but the flu season is far from over. Respiratory viruses are unpredictable, so it’s crucial that eligible individuals get vaccinated to safeguard themselves and others.”
Vaccine appointments are still accessible via the NHS national booking system, and it is urged that those in high-risk categories take advantage without delay. RSV vaccines are available year-round to pregnant women and older adults who have not yet received their doses.
By following these expert recommendations and maintaining good hygiene practices, the UK can effectively manage this rise in norovirus and keep overall infection levels under control.