An additional dose of a vaccine administered at determined intervals to promote immunization against a specific disease or diseases and to advance the immune system’s ability to defend the body against the disease or diseases. Booster shots for tetanus and diphtheria are commonly recommended for adults at 10-year intervals after the initial vaccination.
An additional dose of an immunizing agent to increase the protection afforded by the original series of injections. The booster is given some months or years after the initial immunization.
A vaccination given after a previous vaccination. A booster helps maintain or increase a protective immune response.
A booster dose of a vaccine is administered as a follow-up after an initial course of immunization to enhance or extend immunity.