How Do Booster Shots Work to Reinforce Immunity Over Time?

Staying healthy year-round takes more than just eating well and exercising. One of the most reliable ways to support your immune system is by keeping up with recommended vaccinations, including booster shots. At Lawrence Family Practice Center in Lawrence, KS, our dedicated team helps patients of almost all ages stay on track with their care to build long-term immune support and better protect against preventable diseases. If you have questions about the importance of immunization or the role that booster shots play in a long-term health plan, we're here to provide answers.

What is a booster shot?

A booster shot is an additional dose of a vaccine that is given after the original vaccination series is complete. It's scheduled to be administered months or even years later, depending on the disease and how long protection typically lasts. Booster shots are built into many vaccine schedules to help extend immunity and reduce the risk of serious illness. They're especially important during adulthood, periods of increased exposure, or when certain infections become more active in the community.

What does a booster shot do to reinforce immunity?

After a vaccine is given, the immune system produces antibodies that help recognize and fight off future infections. Over time, that antibody response can decline, making the body less prepared to respond. A booster shot stimulates the immune system to produce a fresh wave of antibodies and re-engage immune memory cells. Booster shots help the body react faster and more effectively if exposed again, reducing the risk of infection or helping minimize the severity of symptoms.

How many booster shots are there?

The number of booster shots you may need depends on your age, health status, and the specific vaccine. Some are required during childhood, while others are recommended throughout adulthood. Some of the most common booster shots we provide at Lawrence Family Practice Center include:

• DTaP/Tdap (Diphtheria, Tetanus, Pertussis): First given in childhood with adult boosters every ten years.
• MMR (Measles, Mumps, Rubella): Occasionally needed in adulthood, especially before travel.
• Varicella (Chickenpox): May require a booster if immunity weakens.
• COVID-19: Updated boosters are recommended based on the latest guidelines.
• Influenza: Given annually to account for changing strains.
• Hepatitis B: Boosters may be needed for long-term protection, depending on your risk level.

How long do booster side effects last?

Most side effects from a booster shot are mild and temporary. Common symptoms include soreness at the injection site, fatigue, headache, or a low-grade fever. These reactions usually appear within a day and typically go away in 24 – 48 hours. It's your body's way of building protection, and these signs often mean your immune system is doing its job. If side effects persist beyond a few days or feel severe, contact our providers in Lawrence, KS for guidance.

Protect your health

Keeping up with your vaccine schedule, including boosters, is a smart and simple way to invest in your long-term health. Regular updates to your immunity help reduce the risk of illness, lower the chance of spreading infections to others, and give your immune system the extra support it needs. Our caring providers at Lawrence Family Practice Center in Lawrence, KS, are here to guide you and your family through your vaccine needs at each stage of life. Reach out today to stay on track and help keep your body protected.