People who have already had norovirus, the winter vomiting bug, could be at risk of catching it again this season, experts from the the UK's Health Security Agency say. Data shows a different strain of the virus is on the rise and having had one strain doesn't necessarily protect you from catching another,

If you have the norovirus, you'll likely not experience respiratory symptoms such as congestion and a cough according to Doctor Stuart Ray, a professor of medicine and oncology at Johns Hopkins University School of Medicine. Having a headache, sore throat and cough are symptoms that “differentiate norovirus from influenza,” Martinello adds.

Infections of the winter vomiting bug are on the rise, with numbers at the highest level since reporting began in 2014, the UK Health Security Agency (UKHSA) warns. The health agency has sounded the alarm over a potential second wave of the norovirus as people who have already been infected this winter could be at risk again.

The UK Health Security Agency (UKHSA) is warning of a rise in norovirus cases and the potential for a second wave. Experts caution that even if you've already had the virus, you could be at risk of re-infection.

Certain individuals, including young children, older adults, and those with weakened immune systems, are at a higher risk of severe symptoms that may lead to dehydration. It is important for anyone experiencing these symptoms to stay well-hydrated by drinking plenty of fluids.

Health leaders have warned of a “potential second norovirus wave” – with people catching the vomiting bug more than once. The UK Health Security Agency (UKHSA) said people who have already had the virus this winter could be at risk again due to a shift in which strains are becoming dominant.