Viral immunity is a branch of immunology that focuses on the body's ability to recognize and defend against viral infections. This includes studying how the immune system recognizes viral antigens, mounts an immune response, and develops memory cells to provide long-lasting protection against specific viruses. Researchers in this field also study how viruses evade the immune system, as well as how variations in viral strains can impact immune responses and vaccination strategies. Understanding viral immunity is crucial for developing effective antiviral therapies and vaccines.