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question

How does blood help fight infection?

Anthony L. Komaroff, MD
Anthony L. Komaroff, MD
Internal Medicine
answer
Blood participates in innate immunity. Proteins known as complement proteins circulate in the blood, coating invading bugs and punching holes in them, which speedily destroys them. Small fragments of complement proteins also adhere to the pathogen surface, flagging them for destruction by phagocytes.

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