viral capsid antigen

Viral capsid antigen refers to specific molecules present on the outer shell, called the capsid, of a virus. These antigens are recognizable by the immune system, which can mount a response to fight the infection. They are important in diagnosing viral infections and in developing vaccines since they help the body identify and remember the virus. Essentially, the capsid antigen serves as a signature that indicates the presence of a particular virus and triggers immune defenses.