ImmuneResponse

media type="yahoo" key="3134456" width="425" height="350" [|The immune response is how your body recognizes and defends itself against bacteria, viruses, and substances that appear foreign and harmful to the body.] The immune system protects the body from potentially harmful substances by recognizing and responding to antigens. Antigens are molecules on the surface of cells, viruses, fungi, or bacteria. Non-living substances such as toxins, chemicals, drugs, and foreign particlesImmuneResponce can be antigens. Even your own body cells have [|protects] that are antigens. These include a group of antigens called [|HLAantigens .] Your immune system learns to see these antigens as normal and does not usually react against them.