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Interferons are

  • A.Cytokine barriers
  • B.Physical barriers
  • C.Cellular barriers
  • D.Physiological barriers

Answer: A

Correct answer: Cytokine barriers

Interferons are cytokines released by virus-infected cells; they make neighbouring cells resistant to infection and rouse natural killer cells. They belong to the cytokine barrier of innate immunity - chemical signals rather than physical structures or cells.

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