immunity

Immunity is the body's natural ability to recognize and defend against harmful organisms like bacteria, viruses, and other pathogens. When protected by immunity, the body can identify these invaders and respond quickly to eliminate them, preventing illness. There are two main types: innate immunity, which provides immediate, general defense, and adaptive immunity, which develops over time and remembers specific pathogens for faster future responses. Vaccinations help build immunity by training the immune system without causing illness. Overall, immunity is essential for maintaining health and protecting the body from infections.