Includes the lymph nodes, which are immune system command centers. They are found in blood, lymph, and lymphoid tissues. B-cells become memory or plasma cells. A pure antibody that recognizes only one epitope. It is isolated from a single B-cell and grown in cell culture.
Immunity exists as long as the antibodies remain in the body, usually days or weeks.
A mixed population of antibodies that recognize numerous epitopes. An immune cell capable of responding to an infection that is not currently active. A structure on the surface of every T-cell that acts as a docking bay for antigens. A T-cell has around 20,000 copies of the same receptor dotted all over its surface. HIV Plus .