Vaccinations are essential for maintaining health at every stage of life. Candidates for vaccinations include infants, children, and teens who need immunizations to protect against serious diseases like measles, polio, and HPV. Depending on age and health risks, adults can benefit from vaccines such as the flu shot, tetanus boosters, and those for shingles or pneumonia. Individuals with certain chronic conditions, those who travel frequently, or anyone exposed to specific workplace hazards may also require additional vaccines.