The impact of this surge is most noticeable in hospitals and care homes, where norovirus has spread rapidly, particularly among people aged 65 and older
Health authorities in the United Kingdom (UK) have raised concerns this week about the possibility of a second wave of norovirus infections, with new data indicating a surge in cases across the country. The UK Health Security Agency (UKHSA) has reported a significant increase in norovirus cases, with numbers at the highest levels since tracking began in 2014.
Between February 3 and 16, norovirus cases were nearly 30 percent higher than the previous fortnight, according to the UKHSA. The latest surge has resulted in more than double the average number of cases seen in the last five seasons. This uptick is particularly worrying as norovirus usually begins to decline around this time of year as the weather starts to warm up. However, the UKHSA has cautioned that it is too early to determine whether the virus has reached its peak this season.
The impact of this surge is most noticeable in hospitals and care homes, where norovirus has spread rapidly, particularly among people aged 65 and older. Vulnerable populations are at heightened risk, with the virus having the potential to cause significant disruption in healthcare settings. The UKHSA has urged caution, advising the public to take necessary precautions to prevent further outbreaks.
The most recent data also highlights a shift in the circulating strains of norovirus. The GII.17 genotype, a new variant, has been linked to the increased number of cases this season. Additionally, the more established GII.4 strain is also making a resurgence, raising concerns over the virus’s evolving nature and its potential for further spread.
Norovirus is a highly contagious virus that typically causes sudden gastrointestinal symptoms, including vomiting, diarrhea, and stomach cramping. In some cases, individuals may also experience mild fever, chills, headache, and muscle aches. Symptoms usually develop one or two days after exposure to the virus, and while most people recover within one to three days, the infection can be particularly severe for the elderly and those with weakened immune systems.
The UKHSA’s warning comes as the country grapples with a growing number of outbreaks linked to the virus. The highly contagious nature of norovirus means that it can spread quickly, particularly in confined environments such as hospitals, nursing homes, and schools. As a result, health authorities are urging the public to be vigilant and follow preventive measures, including frequent hand washing and staying home when symptomatic to prevent further spread.
This surge in norovirus cases in the UK is part of a wider trend seen internationally. The Centers for Disease Control and Prevention (CDC) in the United States also reported an unusually high number of norovirus outbreaks in December, with the virus continuing to impact various regions. Although norovirus can occur throughout the year, outbreaks are most common between November and April. In the US, it is estimated that the virus affects between 19 and 21 million people annually, making it a significant public health concern.
Health experts have stressed the importance of good hygiene practices, particularly during this period of heightened activity. People are advised to wash their hands thoroughly, avoid preparing food for others if they are feeling unwell, and avoid close contact with vulnerable individuals, especially in healthcare settings.
As the UK continues to monitor the situation, authorities are keeping a close eye on the evolving nature of the virus and its impact on healthcare systems. While the peak of the current wave is still uncertain, experts are working to ensure that appropriate measures are in place to manage and control the outbreak.
The UKHSA continues to provide updates and guidance to healthcare providers and the general public as they navigate the ongoing risk posed by norovirus.
