What are the outcomes of an antigen-antibody reaction?

The outcomes of an antigen-antibody reaction include neutralization, where antibodies block the harmful effects of toxins or pathogens; agglutination, where antibodies cause pathogens or particles to clump together for easier removal; and opsonization, which enhances phagocytosis by marking pathogens for destruction by immune cells. Additionally, the formation of antigen-antibody complexes can activate the complement system, leading to the lysis of cells and further immune responses. Overall, these reactions play a crucial role in the immune system's ability to identify and eliminate foreign substances.