![Image from 'Nature's "Self" Defence](https://www.immunology.org/sites/default/files/natures-self-defence.PNG "Image from 'Nature's \\"Self\\" defence")
Our guide to the immune system 'Nature's "Self" Defence' is available as a downloadable PDF, including a selection of questions submitted by secondary students with answers provided by professional immunologists.
Welcome Aboard from the BSI
The immune system, in all its guises, is a fascinating structure - the product of millions of years of evolution. However, understanding all of its subtleties is often difficult for those first making its acquaintance, as there seems to be far too much going on at once to take everything in!
Nature's "Self" Defence is our online beginner's guide to the immune system.