How does a permanent immunity develop?

Answer 1

Permanent immunity develops when the immune system encounters a pathogen and creates a robust response, often through the activation of B cells and T cells. B cells produce antibodies that specifically target the pathogen, while T cells help eliminate infected cells and support B cell function. After the initial infection, some of these immune cells become memory cells, allowing the immune system to respond more rapidly and effectively upon subsequent exposures to the same pathogen. This process is often enhanced through vaccination, which stimulates the immune system without causing disease.