Dr. Joseph A. Arnold, DDS ,

Vaccines work by training your immune system to recognize and fight off harmful germs, such as viruses or bacteria, without causing the illness itself. They contain tiny, safe components of these germs—like proteins or inactivated forms—that stimulate your body’s natural defenses. This process helps your immune system “remember” the invader, so if you’re exposed to the real disease in the future, your body can quickly respond and protect you. For patients and caregivers, understanding this science highlights the immense value of immunization: vaccines not only reduce your risk of getting sick but also help protect your loved ones and community by preventing the spread of dangerous diseases.