Evolution & Illness is an introduction to evolutionary medicine in Persian language. Evolutionary medicine is a newly forming branch of biology which is about the application of modern evolutionary theory to health and illness. It challenges the current mechanistic medical explanations by focusing on the evolution of pathogentens and their interactions with human organs in terms of their virulence, resistance to antibiotics and subversion of an individual's immune system. This book is also part of an attempt to transfer modern evolutionary ideas to Persian academic culture in a jargon free and easy to follow style.