Your Intelligent Immune System

When my son received life-saving treatment for lymphoma, a cancer of the immune system, my interest was ignited. What do scientists mean when they talk about the immune system? How does it work? How does it protect us and why does it sometimes fail? Which diseases directly reduce its powers? And why does it sometimes cause tissue rejection, allergies and autoimmune diseases? These questions took me back to the biological sciences, the subject that fascinated me at university. I found that k...