Humoral and Cell-Mediated Immune Responses The immune system distinguishes two groups of foreign substances. One group consists of antigens that are freely circulating in the body. These include molecules, viruses, and foreign cells.
Humoral immunity is immunity from serum antibodies produced by plasma cells. More specifically, someone who has never been exposed to a specific disease can gain humoral immunity through administration of antibodies from someone who has been exposed, and survived the same disease.
I believe that the best answer among the choices provided by the question is are the following :
<span> H2O2 H2O </span><span>catalase</span> Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
