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germ theory of disease
conclusion that infectious diseases were caused by microorganisms of different types, commonly called germs
the process in which the infection is fought off through the production of cells that inactivate foreign substances or cells
specific defenses carried out by the immune system if a pathogen is able to get past the body's nonspecific defenses
when T cells provide a defense against abnormal cells abd pathogens inside living cells
when antibodies produced by other animals against a pathogen are injected into the bloodstream
when a single cell or a group of cells begin to grow and divide uncontrollably resulting in a mass of growing tissue
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