Substances that cause an immune response in the body. The body "sees" the antigens as harmful or foreign. To fight them, the body produces antibodies, which attack and try to eliminate the antigens.
substances that activate the immune system. Any substances that as a result of coming into contact with appropriate cells, induces a state of sensitivity and/or immune responsiveness after a latent period, and which results in a demonstrable way with antibodies with antibodies and/or immune cells of the sensitized subject.
substances that provoke an immune response in the body. The body produces antibodies to fight antigens, or harmful substances, to try to eliminate them.