Every year, thousands of people in the UAE choose to protect themselves against seasonal influenza with a flu vaccine. It’s one of the simplest and most effective ways to avoid the fever, fatigue, and complications that come with having the flu. But if you’re preparing for your shot, it’s normal to wonder: what side effects might I expect, and how long will they last?
The good news is that the flu vaccine has an excellent safety record. Most side effects are mild, short-lived, and a sign that your immune system is doing its job. In this guide, we’ll look at the most common reactions, what’s different if you’re pregnant, how the pneumonia vaccine compares, and when to seek medical advice.
Common Side Effects of the Flu Vaccine
The most common reaction when getting a flu vaccine is a little soreness where the needle went in. You may notice redness, warmth, or swelling around the injection site, which usually lasts a day or two [1][5].
Some people also feel a bit run-down for a short time. A mild fever, tiredness, headache, or muscle aches can appear within 24 hours after vaccination [5][1]. These side effects are considered normal and generally disappear without treatment within one to two days. These side-effects are a sign that your immune system is responding to the vaccine and building protection against influenza [1][5].
Less Common or Rare Side Effects
Occasionally, people may notice less typical reactions. A mild skin rash, itching, or hives can happen in some cases. This type of reaction often resolves on its own, but if it spreads widely or is accompanied by swelling of the face or throat, it may indicate an allergic reaction that requires urgent medical care [5][4].
Severe reactions are extremely rare. The flu vaccine used in the UAE is inactivated, meaning it cannot cause influenza infection, and serious side effects such as anaphylaxis are exceptional events [1][4][5]. The nurse who vaccinates you is trained to deal with allergic reactions and can treat them immediately.
How Long Do Flu Vaccine Side Effects Last?
The majority of mild reactions clear up quickly. Arm soreness, redness, or swelling generally improves within two or three days. Fever, headache, or body aches usually pass in 24 to 48 hours [5][1].
Your overall health can influence recovery. Children and younger adults may bounce back faster, while older adults or those with weaker immune systems may notice symptoms that linger a little longer. Still, in nearly all cases, flu vaccine side- effects are temporary [1][3].
Flu vs. Pneumonia Vaccine Side Effects
Some adults are advised to receive the pneumonia vaccine alongside their flu shot, particularly those over 65 or with chronic conditions. Both vaccines can cause mild side effects, but there are some differences.
The pneumonia vaccine is more likely to cause prolonged arm soreness, sometimes lasting several days. Flu vaccine reactions, on the other hand, tend to be shorter and milder overall. Both vaccines are safe and effective, but each is recommended for different groups: flu vaccines are annual and widely encouraged, while pneumonia vaccines are targeted at higher-risk individuals [4][2][5].
According to Dr Rahmana, General Practitioner at Smart Salem, "Both the flu and pneumonia vaccines may cause some mild side effects like soreness at the site of injection or low-grade fever which will resolve within a few days". Dr Walaa, Specialist Family Medicine Doctor, adds "flu vaccine reactions are usually milder and shorter, while pneumonia vaccine effects last slightly longer but provide longer-term protection".
When to Seek Medical Advice
While side effects are usually nothing to worry about, it’s important to know when to get help. You should contact a doctor if:
- Symptoms last longer than three days without improvement.
- You develop a high fever or unusual neurological symptoms.
- You experience swelling of the face or throat, difficulty breathing, or a rapid heartbeat; these may be signs of a severe allergic reaction which needs urgent treatment [5][2].
- You’re pregnant and notice anything beyond the typical mild reactions.
How to Ease Side Effects at Home
Most people find that side effects need little or no treatment. Still, a few simple steps can make you more comfortable:
- Apply a cool compress to your arm to ease soreness and reduce swelling.
- Keep moving your arm gently rather than holding it stiff.
- Rest, hydrate, and eat nourishing foods to support your immune system.
- If needed, a doctor may recommend mild pain relief such as paracetamol [2][5].
Getting Your Flu Vaccine Safely in Dubai & the UAE
Flu vaccines in the UAE are carefully regulated and approved by health authorities such as MOHAP and DHA [1][3][4]. Vaccination centers follow strict safety standards, with trained staff to guide patients through the process and explain what to expect. Providers like Smart Salem’s flu vaccination service make this experience straightforward, combining DHA-approved protection with clear guidance on what to expect before and after your shot.
Side Effects Are Temporary, Protection Lasts All Season
The flu shot is one of the best defences against seasonal illness. While mild side effects are common, they’re temporary, and the protection you gain can last for months. Don’t let the fear of a sore arm or brief fatigue keep you from safeguarding your health. At Smart Salem, our DHA-approved clinics provide a smooth vaccination experience so you can focus on enjoying a healthy flu season.
FAQs
What are the side effects of the flu vaccination when pregnant?
Pregnant women typically experience the same mild side effects as anyone else, soreness at the injection site, mild fever, or fatigue. UAE guidelines confirm that the flu vaccine is safe during all trimesters.
Can the flu vaccine cause long-term side effects?
No. UAE health authority guidance confirms that the flu shot does not cause long-term complications.
Do children experience different side effects from adults?
Children may develop mild fever or fussiness after vaccination but otherwise experience the same reactions as adults.
What should I do if I experience severe side effects after vaccination?
Seek immediate medical help, especially if you notice swelling, difficulty breathing, or severe rash.
Can I take over-the-counter medicine to ease flu vaccine side effects?
Yes, if advised by your doctor. Medications such as paracetamol can help relieve soreness or fever.
SOURCES
- https://mohap.gov.ae/assets/78a5f0ac/seasonal-influenza-awareness-guide-2023-2024.aspx
- https://www.dha.gov.ae/uploads/102022/Seasonal%20Influenza%20Awareness%20Guide_EN20221012496.pdf
- https://nmc.ae/en/news/uae-residents-reminded-to-take-the-flu-shot-615
- https://www.dha.gov.ae/uploads/102024/Clinical%20Guideline%20for%20Best%20Practice%20in%20Immunization20241028945.pdf
- https://www.healthline.com/health/flu-shot-side-effects
