Problem: Describe the primary and secondary immune responses, indicating when each might occur and how long it takes to mount a full response, as well as WHY they are different. Also describe 2 ways you can have active immunity and 2 ways of passive immunity, and which one produces the primary and secondary responses.

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Immune response is categorized into primary and secondary immune responses. Primary response is the initial response of the body upon the first encounter with the antigens. It is often a slow reaction and leads to the generation of memory cells with a high specificity for the inducing antigen. While the secondary immune response of B‐ and T cells is observed following subsequent encounter with the same antigen. Unlike the primary response, secondary response reacts more rapidly leading to the activation of previously generated memory cells. 

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Problem Details

Describe the primary and secondary immune responses, indicating when each might occur and how long it takes to mount a full response, as well as WHY they are different. Also describe 2 ways you can have active immunity and 2 ways of passive immunity, and which one produces the primary and secondary responses.

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