An immunogen is any foreign substance that when introduced into the body stimulates a specific immune response in the form of antibody formation or cell-mediated immunity. For a substance to be immunogenic, it must...
Hundreds of different antigens have been found on the surfaces of human blood red cells. Most of these are weak and are mainly of importance in genetic studies, however, two particular groups of antigens...
Acquired immunity is the resistance of the body to new pathogens or that have infected the body before, If the second line of defence failed in getting rid of the foreign body, the body...
Some organs of the immune system are called lymphoid organs because they are home to lymphocytes which are the main components of the lymphatic system, The parts of the immune system are scattered throughout...
