Difference Between Two Immune Responses

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Recommended: Chapter 9: The Immune System and Mechanisms of Defense

When something foreign is produced into the body, our immune system automatically goes into overdrive. “Is this something I’ve encountered before or is this a new invader?” Our body must distinguish between the two. This is known as either a primary or secondary immune response. If this is initial contact with the foreign antigen, it is known as a primary immune response. Over a period of several days, the body begins to produce an adequate amount of antibody against the invading antigen. This is a non-specific line of defense because it is the first instance of contact with the antigen. The bone marrow produces T lymphs and B lymphs that play an important role in this primary immune response. T lymphs travel to the thymus while B lymphs

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