Blog
Common Side Effects of the Flu Shot (and Why the Benefits Outweigh the Risks)
Every year, millions of people receive the flu vaccine to protect themselves and their communities from influenza. One of the most frequent concerns patients raise is about flu shot side effects. While some people may experience mild reactions, these side effects are temporary and generally a sign that your body is building protection. At CFP Physicians Group, we encourage patients to understand both the risks and the benefits so they can make confident, informed choices about their health.
What Are the Common Flu Shot Side Effects?
Most side effects of the flu shot are mild and resolve within a day or two. These can include:
- Soreness or redness at the injection site – This is the most common reaction and usually goes away quickly.
- Low-grade fever – A mild fever may occur as your body builds an immune response.
- Fatigue – Some people feel more tired than usual for a short period after the vaccine.
- Headache or muscle aches – These flu-like symptoms are usually mild and short-lived.
These side effects are not the flu itself. The flu vaccine does not cause influenza—it simply stimulates your immune system to recognize and fight the virus if you’re exposed later.
Rare Flu Shot Side Effects
Serious reactions to the flu vaccine are very rare. These can include:
- Severe allergic reactions (anaphylaxis), typically in people with a severe egg allergy or allergy to other ingredients in the vaccine.
- Guillain-Barré Syndrome (GBS) – A very rare neurological condition, affecting about 1 to 2 people per million vaccinations.
If you have concerns about allergies or medical conditions, the providers at CFP Physicians Group will review your health history and recommend the safest option for you.
Why Side Effects Are Actually a Good Sign
Experiencing side effects after the flu shot can feel uncomfortable, but it’s actually a sign that your immune system is responding. Your body is building antibodies that will help protect you if you’re exposed to the flu virus later in the season.
Even if you don’t notice any side effects, the vaccine is still working—it simply means your body responded without noticeable symptoms.
Why the Benefits Outweigh the Risks
While mild side effects may last a day or two, the flu itself can cause weeks of illness, complications like pneumonia, and in some cases hospitalization or death. The benefits of getting the flu vaccine far outweigh the risks:
- Reduces the risk of flu-related doctor visits and hospitalizations
- Protects vulnerable populations like infants, older adults, and people with chronic conditions
- Decreases the severity of symptoms if you do get sick
- Helps reduce community spread during flu season
By protecting yourself, you also protect those around you who may be more vulnerable.
When and Where to Get Your Flu Shot
The best time to get vaccinated is before flu season peaks—typically in September or October. However, vaccination later in the season can still provide valuable protection.
At CFP Physicians Group, flu shots are available during Annual Physicals, Annual Wellness Visits, Primary Care, and Geriatric Care appointments. With services like Telemedicine and diagnostic testing, we make preventive care convenient and accessible for every patient.
Supporting Your Health Beyond Vaccination
While the flu vaccine is an important part of preventive care, staying healthy also involves regular checkups and screenings. Our team at CFP Physicians Group offers a wide range of services to help you maintain your overall wellness, including:
- Women’s Health
- Blood Work, X-Ray, Dexa Scan, and Ultrasounds
- Botox and aesthetic services
- Comprehensive Primary and Geriatric Care
We are committed to helping you live a healthier, fuller life with personalized medical care.
Stay Protected This Flu Season
Mild flu shot side effects are temporary and far less serious than the flu itself. By choosing vaccination, you’re making a proactive decision to protect your health and the health of those around you.
Don’t wait until flu season is in full swing—schedule your flu shot today. Contact CFP Physicians Group to make an appointment and learn more about our full range of healthcare services.
