AIDS is caused by a virus that attacks complement enzymes.
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Q81: The foreign, or "non-self" substances that trigger
Q82: In active immunity, a person becomes immune
Q83: An injection of synthetic antibodies imparts active
Q84: A substance that can stimulate a primary
Q85: Lymph is _ that has entered a
Q87: _ are masses of partially encapsulated lymphatic
Q88: Two mechanical barriers to infection are interferon
Q89: During the primary immune response, B lymphocytes
Q90: Normal immune responses require T and B
Q91: Disease-causing agents such as viruses and bacteria
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