which of the following is a genetic factor for autoimmune disease , poor diet , smoking , viral infection , family history of autoimmune disorders, which environmental triggers can increase the risk of autoimmune diseases , exercise , infection , balanced diet , adequate sleep, what is the main function of the immune system , pump blood throught the body, protect the body from harmful germs , Which cells in the immune system help identify and destroy foreign invaders?, red blood cells , white blood cells .

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