Epitope

An epitope is a specific part of a pathogen, such as a virus or bacteria, that the immune system recognizes and targets. Think of it as a unique "signature" on the surface of the pathogen. When the immune cells or antibodies identify this signature, they can respond by attacking the invader. Epitopes are crucial in vaccine development because they help trigger a focused and effective immune response, teaching the body how to recognize and fight the actual pathogen if encountered in the future.