Homonym: Boosters (Enhancers)
Boosters are additional doses of a vaccine given after the initial series to enhance or prolong immunity against a disease. They help the immune system recognize and fight off pathogens more effectively, especially as immunity can wane over time. Common examples include the COVID-19 vaccine boosters and the influenza vaccine boosters.
These booster shots are particularly important for certain populations, such as the elderly or those with weakened immune systems, who may not respond as well to the initial vaccinations. Health authorities recommend boosters based on factors like age, health status, and the prevalence of specific diseases in the community.