Innate immunity (also known as inborn immunity) in humans is present from birth. It is non-specific type of defence. It provides different barriers to the entry of pathogens into the body.
Cytokines are a category of proteins synthesized by the immune system and which act as chemical messengers. They favour cell-to-cell communications. Cytokines serve to initiate and regulate immune responses.
It includes interferons that are produced by virus-infected cells, which aim to protect non-infected/normal cells from viral infection by inhibiting viral replication. Interferons play a vital role in controlling viral diseases but they do not kill the virus.
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