Your immune system is hard at work when you are sick. It's on the job when you are well, too-invisible, silent, powerful. Human life depends on immunity. You couldn't survive without it. Yet our knowledge of its basis is barely a century old, and we are perhaps centuries more away from a full understanding. Today in laboratories all over the world, scientists are
striving to unlock the secrets of the immune system - secrets that could
prolong life and
promote health for generations in the future. The frontiers of medical science are molecules and atoms we can't see, even with our most powerful microscopes. In this book for young adult readers, author Faith Brynie answers some of the question