Which of the following immunity is called the first line of defense?

Q. Which of the following immunity is called the first line of defense?
Answer: Innate Immunity
Notes: Innate Immunity is called the first line of defense. Innate immune cells are white blood cells that mediate innate immunity and include basophils, dendritic cells, eosinophils, Langerhans cells, mast cells, monocytes and macrophages, neutrophils, and NK cells.

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