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What is RSV and who is eligible for the vaccine?

Posted by: Blog Editor, Posted on: 11 September 2026 - Categories: immunisations, Winter
Group of pregnant women sitting together

Respiratory syncytial virus (RSV) is a major respiratory virus that is most common over the winter period, typically November to February. Most cases are mild, but RSV can be serious, especially for infants and older adults.

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What winter bug do I have? Know the signs and symptoms 

Posted by: Blog Editor, Posted on: 18 December 2024 - Categories: Winter
Montage of people against colourful backgrounds, some sneezing, coughing or sheltering under blankets

We see cases of flu, RSV, COVID-19 and norovirus throughout the year, but in winter they circulate at the same time and can reach high levels.   We also track other respiratory viruses – rhinovirus, adenovirus, human metapneumovirus (hMPV) and parainfluenza …

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The official blog of the UK Health Security Agency, providing expert insight on the organisation's work and all aspects of health security.

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  • How to avoid freshers' flu at university, and spot the warning signs of meningitis 25 September 2026
  • Sewage detectives: how UKHSA is using wastewater to track common viruses and emerging threats 23 September 2026
  • What are the symptoms of scarlet fever and is it contagious? 21 September 2026

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