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23 September, 16:33

A secondary immune response differs from the primary immune response in that:

A. it is more rapid than the primary response and results in higher antibody levels.

B. it is slower than the primary response and doesn't change the antibody levels.

C. it occurs at the same time as the primary response but results in a decrease in antibodies.

D. it only occurs in hyperallergic reactions and results in a decrease of antibodies.

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  1. 23 September, 18:20
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    Option A, it is more rapid than the primary response and results in higher antibody levels.

    Explanation:

    When an antigen contacts the immunity system for the first time it leads to a primary immune response. Since it is the first interaction, it requires more time to produce effect.

    While a secondary response occurs when the same antigen attacks the same person second, third or n number of times. During secondary response, the body already has a memory of primary immune response and thus it is faster.

    Hence, option A is correct
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