One way that a person acquires lifelong immunity to a particular illness is through the process of memory cells developing from the B cell that was originally exposed to the disease antigen.

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Memory cells are a type of B cell that develop after exposure to an antigen, and they enable the body to produce a rapid and effective response if the same antigen is encountered again in the future. This leads to lifelong immunity against that particular illness.

One Way That a Person Acquires Lifelong Immunity to a Particular