Activating antigens

Activating antigens are specific molecules on the surface of pathogens like bacteria, viruses, or other foreign substances. When these antigens enter the body, they signal immune cells to recognize and respond to the threat. They serve as the key identifiers, helping the immune system distinguish harmful invaders from the body's own cells. This activation process triggers immune responses such as the production of antibodies and the activation of immune cells to eliminate the threat effectively. In essence, activating antigens are the flags that alert and guide the immune system to fight infections or foreign particles.