ApBo
Chapter 43 TheImmuneSystem 43-3,4 Active/Passive Immunization Active immunity : defenses that arise when a pathogen infects the body and prompts a primary or secondary immune response Passive immunity : antibodies guard against pathogens that have never infected them (lasts as long as antibodies last) ? Example: mother?s IgG & IgA antibodies to baby Artificial active immunity: immunization (vaccination) Antigens used to make vaccines Artificial passive immunity: inject antibodies from an animal already immune into another animal ? Short-term but immediate Polyclonal/Monoclonal Antibodies : Polyclonal or monoclonal Polyclonal : products of many different clones of plasma cells Monoclonal : made from a single clone of B cells grown in culture