What does "Booster" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
A booster in medicine refers to an extra dose of a vaccine that you've already received. It's given after the initial vaccination to help your body build up enough defenses against a disease. The booster helps to "boost" or strengthen your immune system's response to the disease. It's like a reminder to your body to keep fighting off the disease.
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