In this section, we take a closer look at the side effects that can occur after vaccination. While the idea of side effects may seem concerning, it's important to remember that they are generally mild and short-lived—a normal part of the body’s process of building immunity. We'll explain what to expect at different ages, how to identify common reactions, and when it's appropriate to reach out to your doctor. By understanding these details, you'll be better prepared and reassured about the overall safety and value of vaccines in protecting your child's health.