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a person is exposed naturally or artificially to an antigen and their own immune system provides immunity
another person or animal develops immunity and the immunity is transferred to a nonimmune person
Active Natural Immunity
natural exposure to an antigen/virus; immune system responds; 1st exposure causes symptoms because person is not immune
Active Artificial Immunity
antigens are deliberately introduced in a vaccine to stimulate immune system; preferred method for acquired adaptive immunity
Passive Natural Immunity
antibodies from the mother are transferred to her child thru placenta (IgG) or milk (IgA) providing baby with protection for a few months
Passive Artificial Immunity
the transfer of antibodies thru an antiserum from an animal/ person into a human requiring immunity; used for rabies/ snake venoms
a vaccine containing an antigen stimulating immunity w/no symptoms; method used for active artificial immunity
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