Non-specific cellular and chemical defenses
Interferons proteins released by virus- infected cells that protect uninfected tissue cells from viral takeover mobilize immune system
fever systemic response initiated by pyrogens high body temperature inhibits microbial multiplication and enhances body repair processes
phagocytes Engulf and destory pathogens that breach surface membrane barriers macrophages also contribute to immune response
Inflammatory response prevents spread of injurious agents to adjacent tissue disposes of pathogens and dead tissue cells and promotes tissue repair chemical mediators released attract phagocytes (and immunocompetent cells) to the area
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