Humoral Immunology
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چکیده
We are surrounded by a sea of microorganisms that threaten to overwhelm us. This threat is made dramatically clear by the condition of AIDS, where the immune system is crippled by a slowly progressive infection extending over a period of years. In an AIDS patient, opportunistic infectious agents, including bacteria, viruses, and fungi, take advantage of the weakened immune system to invade and multiply unhindered. These are not exotic infectious agents rarely encountered in our environment, but rather widely distributed disease-causing agents that a healthy, functional immune system is able to control under normal circumstances.
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