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  1. Immune response - Wikipedia

  2. Immune System Function, Conditions & Disorders - Cleveland Clinic

  3. Physiology, Immune Response - StatPearls - NCBI Bookshelf

  4. The immune system: Cells, tissues, function, and disease

  5. Overview of the Immune Response - PMC - National Center for ...

  6. Immune response: MedlinePlus Medical Encyclopedia

  7. Immune Response | Immune Cell Types - Geeky Medics

  8. In brief: How does the immune system work?

  9. Immune system | Description, Function, & Facts | Britannica

  10. Overview of the Immune System - The Merck Manuals

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