Well, first of all the activated B Cell moves to another area in the lymph node and begins cloning itself. One becomes two, two become four, four become eight, and so on. This cloning continues until there are roughly 20,000 identical clones, all with copies of the specific receptor that was able to connect to the original antigen, the first virgin B Cells picked up. These B Cell clones begin producing Antibodies that use the blood as a lift to the site of infection and can flood the battlefield and help out—although they are second-rate antibodies. They are OK at their job but not amazing,
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