Why We Get Sick
Chapters 1 and 3.


Chapter 1- Introduction

Overall point of the book-
  - consider the evolutionary basis of disease
  - book is organized into causes of disease (sections in this chapter)
  - stress that this book is mostly speculation, but what is needed is for 
    doctors and biologists to come up with hypothheses and do experiments.
Disease-
  - infectious disease
  - non-infectious (environmental, genetic)



Chapter 3- Signs and symptoms of disease

Think of who benefits from signs and symptoms of disease. If we (the host) benefit, 
then we shouldn't treat this symptom and try to make it go away. If it is helping 
the pathogen, then we should.

Strategies and counter-strategies- our bodies have evolved many ways to fight 
infection, and pathogens have evolved ways to get around them.

Look at Table 3-1.

Things mentioned in this chapter include fever, iron withholding, hygiene, itch, 
skin, grooming, pain/malaise, expulsion (vomit, diarrhea), our immune system, 
evasion, damage/repair