Immunizations protect you from harmful diseases that can be quite serious, leading to hospitalization, disability, and even death. Without protection, these diseases can spread through the population, especially to infants who are too young to get vaccinations or people with compromised immune systems.
You may think of immunizations as something you get in childhood, but protection wears off over time. Older children, teens, and adults need boosters and new vaccines. You may also need additional vaccines due to your job or travel.