Homonym: jab (Punch)
A "jab" is a term commonly used to refer to an injection, particularly a vaccine. Vaccines are designed to help the body develop immunity against specific diseases by introducing a harmless part of the virus or bacteria. This process helps the immune system recognize and fight off the actual disease if encountered in the future.
In sports, particularly in boxing, a "jab" is a quick, straight punch thrown with the lead hand. It is often used to gauge distance, set up combinations, or keep an opponent at bay. A well-timed jab can be an effective tool for both offense and defense in a match.