Every year, thousands of people across the UK get their flu jab to protect against the seasonal influenza virus. The vaccine is one of the most effective ways to prevent flu-related illness, hospitalisation, and complications. However, like any vaccination, you might experience some mild side effects afterwards. Understanding what’s normal — and when to seek advice — can help you feel more confident about your flu jab.
Why the Flu Jab Is Important
The flu virus changes every year, which is why annual vaccination is recommended. The flu jab helps your immune system recognise and fight the latest strains of influenza, reducing your risk of serious illness. It’s especially important for:
✔ Older adults
✔ Pregnant women
✔ People with chronic health conditions (such as asthma or diabetes)
✔ Frontline healthcare workers
✔ Anyone wanting extra protection during flu season
Even if you are healthy, getting vaccinated helps protect others by reducing the spread of flu in your community.
Common Flu Jab Side Effects
The flu jab is very safe, and side effects are usually mild and short-lived. Most people experience little to no reaction. If you do have symptoms, they typically appear within a few hours and go away within a couple of days.
Common side effects include:
✔ Soreness or redness at the injection site – This is the most common reaction and usually subsides within 24–48 hours.
✔ Mild fever – Your body’s immune response may cause a slight increase in temperature for a day or two.
✔ Tiredness or fatigue – Some people feel slightly run-down after their jab as the body builds immunity.
✔ Headache or muscle aches – These symptoms are mild and typically go away on their own.
These reactions are signs that your immune system is responding to the vaccine, helping your body build protection against flu viruses.
Less Common Side Effects
Less common side effects can occur but are still mild. They may include:
✔ Swelling or a small lump where the jab was given
✔ Slightly swollen glands
✔ Mild flu-like symptoms such as chills or body aches
These symptoms don’t mean you have the flu — the vaccine doesn’t contain a live virus and cannot give you influenza. They’re simply part of your immune system’s natural response.
Serious Side Effects: Rare but Possible
Serious side effects from the flu jab are extremely rare. However, as with any vaccination or medicine, allergic reactions can occur. Signs of a severe reaction (known as anaphylaxis) include:
✔ Difficulty breathing
✔ Swelling of the face or throat
✔ Widespread rash or hives
✔ Dizziness or fainting
These reactions happen in fewer than one in a million people and are usually immediate. If you experience any of these symptoms, seek medical help right away. At Luxtons Pharmacy, our trained team monitors patients briefly after the jab to ensure they are safe before leaving.
How to Manage Flu Jab Side Effects
If you experience mild side effects, there are simple ways to relieve discomfort at home:
✔ Take paracetamol to ease soreness, fever, or aches (if suitable for you).
✔ Apply a cool, damp cloth to the injection site to reduce swelling or tenderness.
✔ Stay hydrated and rest if you feel tired or unwell.
Most side effects will go away on their own within a few days. If symptoms persist or worsen, contact your pharmacist or GP for advice.
Can You Still Get the Flu After the Jab?
While the flu jab is highly effective, no vaccine offers 100% protection. You could still catch a different strain not covered by that year’s vaccine. However, if you do get the flu, it’s likely to be milder and shorter-lasting. The jab also significantly reduces the risk of serious complications, hospitalisation, and spreading the virus to others.
Who Should Avoid the Flu Jab?
Most people can safely receive the flu jab, but you should speak to a pharmacist or healthcare professional before vaccination if you:
✔ Have had a severe allergic reaction to a previous flu jab or any of its ingredients
✔ Are unwell with a high fever on the day of your appointment
Your pharmacist can advise on the best time to reschedule your vaccination or recommend alternative options if needed.
Flu Vaccinations at Luxtons Pharmacy in Exeter
At Luxtons Pharmacy, we offer private flu vaccinations for adults, with flexible appointments and short waiting times. Our experienced pharmacists provide professional advice and ensure your vaccination is carried out safely and comfortably. You can also discuss other recommended travel or seasonal vaccines during your visit.
Contact Us to Arrange Your Flu Jab
Flu season doesn’t have to catch you off guard. Protect yourself and your loved ones with a quick and convenient vaccination at Luxtons Pharmacy in Exeter. Contact us today to book your appointment or to find out more about our flu jab services.
This blog post was written on behalf of Luxtons Pharmacy by Pharmacy Mentor.