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What plays an important role in primary ...

What plays an important role in primary and secondary response ?

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The primary and secondary response are carried out with the help of two special types of lymphocytes present in our body that is B-lymphocytes and T-lymphocytes.
B-lymphocytes produce an army of proteins in response to pathogens into our blood to fight with them. These proteins are called antibodies.
T-lymphocytes themselves do not secrete antibodies but help B-lymphocytes to produce antibodies.
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