Influenza vaccine information
What is influenza (the flu)
Influenza, commonly referred to as the flu, is a contagious respiratory infection caused by flu viruses that affect the nose, throat, and, in some cases, the lungs. It spreads easily and rapidly among people through coughing, talking, sneezing, and contact with contaminated surfaces, hands, tissues, and other infected items. While the flu can cause severe illness and complications in anyone, certain groups, particularly older people, are at a higher risk of experiencing serious flu infection, complications, and hospitalisation.
The Influenza Vaccine
The ‘flu’ vaccine is administered via an injection generally into the upper arm. It is a dead vaccine, offering protection against three distinct strains of the flu without the possibility of causing the flu itself. The strains included in this year’s vaccine composition are:
- A/Missouri/11/2025 (H1N1) pdm09-like virus (new strain for 2026)
- A/Singapore/GP20238/2024 (H3N2)-like virus (new strain for 2026)
- B/Austria/1359417/2021 (B/Victoria lineage)-like virus
Flu viruses continually evolve, and each year’s vaccine is designed to protect against the three flu viruses most likely to be prevalent during that year. While it may not prevent all instances of flu, it is the most effective defence against the disease. It is recommended to receive the flu vaccination annually, and it takes approximately two weeks for the vaccine’s protection to develop, lasting several months to a year. It is important to note that conditions not caused by the influenza virus are sometimes mistaken for the flu, and the vaccine solely prevents influenza.
Special Information for People Aged Over 65
People aged 65 and older are more susceptible to severe flu-related illness, and standard vaccines may be less effective in this age group. Consequently, a stronger vaccine is recommended for older people, which is primarily available through general practitioners (GPs). We advise those over 65 to obtain this vaccine from their GP, but if this is not feasible, the vaccine provided by VaxWorks offers greater protection compared to not getting vaccinated at all.
Who Should NOT Receive the Vaccine?
People allergic to influenza vaccines or any of the vaccine components should not be vaccinated. Those with a history of Guillain-Barré syndrome should consult with your GP before receiving vaccination.
People with Egg Allergies
People with egg allergies, including a history of anaphylaxis, can safely receive influenza vaccines.
Flu Vaccine and COVID-19 Vaccine
There is no need to delay getting either the flu or COVID-19 vaccine. Receiving both vaccines on the same day or within
a few days is safe and effective, although it may lead to an increase in some common side effects. Find out more about getting your flu and COVID-19 vaccines together.