What is innate immune and its type?
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Innate immunity (also called natural or native immunity) provides the early line of defense against microbes. It consists of cellular and biochemical defense mechanisms that are in place even before infection and are poised to respond rapidly to infections.
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Innate immunity is non specific type of defence that is present at the time of birth
it is of following types
1) physical barrier- it includes skin, mucus coating of epithelium
2) physiological barrier- acid in stomach, Saliva,tears all act as physiological barrier
3) cellular barrier- it includes leukocytes, monocytes, lymphocytes etc
4) cytokine barrier - it includes interferon which is a protein secreted by infected cell to protect other cell
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