Who gets the flu vaccine free on the NHS?

Adults 65 and over, pregnant women, people with long-term conditions (asthma, diabetes, heart disease, etc.), carers, care home residents, frontline health and social care workers, and children in eligible age groups. Eligibility may change — check current NHS guidance each year.

Can the flu vaccine give you flu?

No. The standard injected flu vaccine contains inactivated (killed) virus and cannot cause flu. The nasal spray for children contains weakened live virus — it may cause mild cold-like symptoms but not full flu.

When should I have the flu vaccine?

Autumn — September to October — before flu typically peaks in winter. It takes about two weeks to build full protection. Having it later in winter still helps if you have not yet been vaccinated.

What are the side effects of the flu vaccine?

Common — sore arm at injection site, mild ache, slight temperature for a day or two. Serious allergic reactions are very rare. The benefits for at-risk groups far outweigh these mild effects.

Does the flu vaccine work every year?

Effectiveness varies depending on how well vaccine strains match circulating flu. Even when not a perfect match, vaccinated people who catch flu usually have milder illness and are less likely to need hospital care.

Flu vaccine | HealthAnswers

Quick answer

What is flu vaccine used for?

The flu vaccine reduces your risk of catching flu and serious complications. In the UK it is offered free on the NHS each autumn to people at higher risk — including over 65s, pregnant women, and those with long-term conditions. Others can pay for it at a pharmacy. It is the best way to protect yourself before flu season.

Why the flu vaccine matters

Influenza (flu) is not just a bad cold — it can cause serious illness, hospital admission and death, especially in older adults, pregnant women, and people with long-term health conditions. The annual flu vaccine is the most effective way to reduce your risk. It is updated each year to match the strains expected to circulate.

Who is eligible for a free NHS flu vaccine

The NHS offers free flu vaccination each autumn to groups at higher risk. Typically includes:

all adults aged 65 and over
pregnant women — at any stage of pregnancy
people with long-term conditions — asthma, COPD, diabetes, heart disease, kidney disease, liver disease, neurological conditions, weakened immune systems
carers and care home residents
frontline health and social care workers
children — nasal spray vaccine for aged 2–3 (GP) and school-aged children

Eligibility is updated each year — check NHS flu vaccine guidance for the current season.

If you are not eligible for a free vaccine, pharmacies offer paid vaccination — usually £10–£20.

Types of flu vaccine

Injected vaccine (inactivated) — standard for most adults. Contains killed virus fragments. Cannot cause flu.

Nasal spray (live attenuated) — for children. Contains weakened live virus. May cause mild runny nose but not full flu illness.

Enhanced vaccines — higher-dose or adjuvanted vaccines for older adults, offering stronger immune response.

How and when to get vaccinated

Book through your GP surgery, pharmacy, or maternity service (if pregnant). Best time is September to October, before flu season peaks — but vaccination later in winter still helps.

It takes about two weeks after vaccination to develop full protection.

Side effects

Most people have no serious side effects:

sore arm at the injection site for a day or two
mild aching or slight fever
children may have a runny nose after the nasal spray

Serious allergic reactions (anaphylaxis) are very rare. Stay at the vaccination site for a few minutes if you have a history of severe allergies.

Flu vaccine and egg allergy

Most flu vaccines are grown in eggs and contain tiny amounts of egg protein. Most people with egg allergy can be safely vaccinated — including those with severe allergy — often with observation afterward. Tell the vaccinator about any allergies.

Flu vaccine vs catching flu naturally

Natural infection provides immunity but at the cost of illness risk — including pneumonia, hospitalisation, and death in vulnerable people. Vaccination provides protection without that risk. It also reduces spread to vulnerable contacts.

Flu vaccine and COVID-19

You can have flu and COVID-19 vaccines at the same appointment if offered. Both are recommended for eligible groups — they protect against different viruses.

If you think you have flu after vaccination

The injected vaccine cannot cause flu. If you develop flu-like symptoms after vaccination, you may have caught flu before the vaccine took effect, or another virus such as a cold. See our flu guide for symptoms and when to seek help.

Common questions

Who gets the flu vaccine free on the NHS?: Adults 65 and over, pregnant women, people with long-term conditions (asthma, diabetes, heart disease, etc.), carers, care home residents, frontline health and social care workers, and children in eligible age groups. Eligibility may change — check current NHS guidance each year.
Can the flu vaccine give you flu?: No. The standard injected flu vaccine contains inactivated (killed) virus and cannot cause flu. The nasal spray for children contains weakened live virus — it may cause mild cold-like symptoms but not full flu.
When should I have the flu vaccine?: Autumn — September to October — before flu typically peaks in winter. It takes about two weeks to build full protection. Having it later in winter still helps if you have not yet been vaccinated.
What are the side effects of the flu vaccine?: Common — sore arm at injection site, mild ache, slight temperature for a day or two. Serious allergic reactions are very rare. The benefits for at-risk groups far outweigh these mild effects.
Does the flu vaccine work every year?: Effectiveness varies depending on how well vaccine strains match circulating flu. Even when not a perfect match, vaccinated people who catch flu usually have milder illness and are less likely to need hospital care.

Sources

NHS — Flu vaccine