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Normal 0 21 false false false ES X-NONE X-NONE Interferons (IFNs) are proteins made and released by host cells in response to the presence of pathogens—such as viruses, bacteria, or parasites—or tumor cells. IFNs induction predominantly occurs in response to microbes, such as viruses and bacteria, and their products. IFNs boost the resistance of surrounding cells, modify the body's immune response and inhibit viral multiplication