a bodily process occurring due to the effect of some antecedent stimulus or agent

one of a series of enzymes in the blood serum that are part of the immune response

(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants

an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia

renewed rapid production of an antibody on the second (or subsequent) encounter with the same antigen

an immune response (chiefly against bacterial invasion) that is mediated by B cells

an immune response (chiefly against viral or fungal invasions or transplanted tissue) that involves T cells

an immune response in which an antigen-antibody combination inactivates a complement (so it is unavailable to participate in a second antigen-antibody combination)

one of a series of enzymes in the blood serum that are part of the immune response

(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants

an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia