9th Class Science Why do we fall Ill? Question Bank 9th CBSE Science Why do we fall Ill?

  • question_answer
    What is immune response?

    Answer:

     When a body is attacked by a foreign molecule or infection, the immune system of the body recruits many cells in the infected area to fight the infection. This response of the immune system when confronted by any infection or invasion of the body by foreign molecule is called immune response.


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