What is the definition of immunity?

The definition of immunity refers to the body's ability to destroy and resist infections. It encompasses the various mechanisms that the immune system employs to recognize and eliminate pathogens, such as bacteria, viruses, and other foreign bodies that can cause disease. This adaptive response not only helps in fighting current infections but also creates a memory of these pathogens, enabling a quicker and more effective response upon subsequent exposures.

The immune system includes components like white blood cells, antibodies, and other substances that work together to identify and neutralize threats to health. In this context, immunity is crucial for maintaining overall health, safeguarding the body against diseases, and is a fundamental principle in understanding how vaccinations work to promote long-term protection against specific infections.