Which of the following substances are produced by the body cells to protect uninfected cells from viral invasion ?
A
Histamine
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B
Complement
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C
Natural killer cells
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D
Interferons
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Solution
The correct option is D Interferons Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of several viruses. In a typical scenario, a virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defenses. Interferons are a group of proteins called cytokines produced by white blood cells, fibroblasts, or T-cells as part of an immune response to a viral infection or other immune trigger. The name of the proteins comes from their ability to interfere with the production of new virus particles.