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The five antibody classes and their distinct roles.
The classes spell GAMED: IgG, IgA, IgM, IgE, IgD.
Hypersensitivity Reactions
Exaggerated or inappropriate immune responses, classified Types I–IV.
Vaccines (Types)
Preparations that stimulate protective immunity against a pathogen.
The Complement System
A cascade of blood proteins that helps the immune system destroy microbes by tagging them, punching holes in them and calling in inflammation.
The Major Histocompatibility Complex (HLA)
A set of cell-surface molecules, called HLA in humans, that display fragments of proteins to the immune system and strongly influence transplant compatibility.