Antigen recognition

Antigen recognition refers to the process by which the immune system identifies foreign substances, such as viruses or bacteria, known as antigens. These antigens have specific molecules on their surface that act like unique "labels." Immune cells, particularly B cells and T cells, have specialized receptors that can detect these labels. When they recognize an antigen, they activate a response to neutralize or eliminate the invader, helping to protect the body against infections. This ability to recognize and respond to a wide variety of antigens is crucial for a healthy immune system.