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1. Interferons:

- anti-viral proteins, "interfere" with viral replication

- virus infected cells release interferons and help nearby cells take defensive

action

- also combat tumor cells

2. Complement proteins:

- group of at least 20 plasma proteins that circulate in blood

- when activated amplifies inflammatory response

- can sometimes kill bacteria by cell lysis

3. Cytokines:

- small proteins which mediate and regulate immunity and inflammation

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12y ago

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