How the Flu Shot Protects You and Your Community

Updated October 29, 2026

Flu season has arrived, and the flu vaccine is your best defense. Choosing to get vaccinated does more than protect your own health; it acts as a shield for vulnerable individuals in your community — including young children, expectant mothers and seniors.

Since flu season typically runs from October through May — with activity peaking mid-winter — early vaccination is the best way to stay protected.

The following common questions and answers can help you get ahead of the flu:

1. Is the Flu Usually More Severe Than a Cold?

While the flu and the common cold may share some symptoms, flu symptoms tend to be more intense and come on suddenly. The flu can lead to serious health complications like pneumonia, bacterial infections and sometimes even hospitalization and death.

2.  How Does the Flu Vaccine Work?

The flu vaccine helps your immune system recognize and fight off the influenza virus before it makes you seriously ill. When you get your flu shot, your body creates antibodies that protect against the strains most likely to circulate that year. These antibodies stay active for months, protecting you and your family throughout flu season.

Every flu season is different. Because flu viruses change over time, the vaccine is updated each year to target the strains expected to cause the most infections.

3. Who Should Get the Flu Vaccine?

Everyone 6 months and older — with a few rare exceptions — should get the flu shot annually. Even if you aren't in a high-risk group, the shot significantly lessens the severity of illness and lowers the likelihood of dangerous complications.

4. When Is the Best Time to Receive the Flu Shot?

For the best protection, try getting vaccinated by the end of October for protection all season long. If you miss the fall deadline, get vaccinated as soon as possible. Flu activity often peaks in the winter and can last until May, so it’s never too late. 

5. Is the Flu Shot Safe?

Yes, the flu vaccine is safe. Before any flu vaccine becomes available, the U.S. Food and Drug Administration (FDA) carefully evaluates the vaccine for several factors, such as:

• Effectiveness

• Consistency

• Safety and quality standards

Once available to the public, the FDA and the Centers for Disease Control and Prevention will continue to monitor the vaccine for any safety concerns.

6. What Are the Side Effects of the Flu Vaccine?

Millions of people, including children, pregnant individuals, and adults over 65, get the flu shot each year and experience little to no side effects. However, some report mild side effects such as:

• Soreness, redness, or swelling at the injection site

• Mild fatigue and body aches, lasting one to two days after the shot

• Headache or low-grade fever

Mild side effects are a normal part of the process and are a sign that your body is building protection. If you experience more severe symptoms, such as trouble breathing and extreme swelling, consult your doctor about next steps.

The Bottom Line

Even if you’re healthy, getting the flu vaccine is far safer than catching the flu, and you being vaccinated will help keep your loved ones and community safe. 

Consult your healthcare provider about scheduling your flu shot and whether you are eligible to receive your updated COVID-19 vaccine at the same visit. Don’t wait. Get vaccinated today.