Over time, the immunity conferred by vaccinations can diminish. This is particularly true for certain vaccines that may provide strong initial protection but whose effectiveness decreases. Boosting is necessary to:
1. Enhance Immunity: Reinforce the body's immune response to the pathogen. 2. Extend Protection: Prolong the duration of immunity against the disease. 3. Control Outbreaks: Prevent the resurgence of diseases, especially in populations with waning immunity.
