Humans have acquired immune system that produces antibodies to neutralise pathogens. Still innate immune system is present at the time of birth because itNEET 2019 (Odisha)

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Innate immunity is non-specific type of defence that is present at the time of birth because it has natural killer cells which can phagocytose and destroy microbes (cellular barriers). Other forms of innate immunity are physical barriers, physiological and cytokine barriers.

Zoology - Human Health and Diseases Question with Solution | TestHub

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