There is still a chance you might get flu after getting vaccinated, but it’s likely to be milder and not last as long.
This year’s autumn/winter vaccine programme has already started with people able to book jabs either through their GP surgery, the NHS app, and certain pharmacies. However, there are some cases in which you shouldn’t get vaccinated.
The NHS said: “If you have a high temperature, wait until you’re feeling better before having your flu vaccine.” Some people could also be allergic to the jab.
“Most people who are eligible for the flu vaccine can have it,” the NHS said. But it clarified: “You only cannot have the vaccine if you’ve had a serious allergic reaction (anaphylaxis) to a previous dose of the vaccine or an ingredient in the vaccine.
“Some of the flu vaccines used in the UK contain egg protein. Tell the person vaccinating you if you have an egg allergy.”
Side effects of the vaccine
The most common side effects of the flu vaccine are “mild” and get better within one to two days. The NHS says they can include:
- Pain or soreness where the injection was given
- A slightly raised temperature
- An aching body
The NHS added: “The injected flu vaccines used in the UK do not contain live flu viruses. They cannot give you flu.”
Having it with other vaccines
You can have the flu vaccine at the same time as other vaccines such as the COVID-19 and shingles vaccines. It’s not usually given at the same time as the RSV vaccine, but you can have them at the same time if a doctor or nurse thinks it’s needed.
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Who can have the vaccine
You can get the free NHS flu vaccine if you:
- Are aged 65 or over (including those who will be 65 by March 31, 2026)
- Have certain long-term health conditions
- Are pregnant
- Live in a care home
- Are the main carer for an older or disabled person, or receive a carer’s allowance
- Live with someone who has a weakened immune system
Frontline health and social care workers can also get a flu vaccine through their employer. For more information, visit the NHS website here.