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    Biology A-Level

    Primary immune response

    What Primary immune response means in Biology A-Level, as defined for OCR.

    Definition of Primary immune response

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    Reference: OCR

    The response that follows first exposure to an antigen; it is slow because the few lymphocytes with a matching receptor must be selected, then divide and differentiate.
    OCR · Communicable diseases, disease prevention and the immune system (study guide)

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