Did you know that the bacterium that causes the STD chlamydia in developed nations commonly causes a [non-sexually transmitted] blinding eye infection in crowded and impoverished third-world countries? Did you know that having type O blood can predispose you to falling victim to the h-pylori bacteria that causes stomach ulcers (and then sometimes cancer?) These are some of the things I learned by reading this book. I love reading books about diseases, especially of the infectious variety. Man and Microbes gives a fairly thorough review of the history of viruses, bacteria, and other microbes from the beginning of mankind to present day (well, almost -- book was printed in 1995.) It is fascinating to read the progression of diseases, how microbes transmit from one host to another, and to think about what yet awaits us in this world. Many of the diseases that killed millions of people in the past (like syphilis) seem to have mutated (along with their hosts) to become less deadly, but some have increased in virulence (like the staph and strep viruses.) The scariest thing I read was the possibility of the HIV virus mutating and becoming airborne, like the virus y-pestis did. The bubonic plague started with the transmission of virus from mice and their fleas to humans, which weakened and killed hundreds of thousands, but didn't become known as The Black Death until it's pneumonic form killed millions -- up to 1/2 of Europe's population at the time.
I feel so fortunate to live in the era of antibiotics and vaccines. My dad remembers the great polio scare from the 1950's, and my grandma, who was born during the "Spanish Flu" outbreak of 1918, recounts that her father became very very ill but survived. My generation, living here in this corner of the US, only hears about such diseases as cholera and typhoid but doesn't worry about them too much because they afflict slums in India (not that I don't care about Indians - just an example) or people in "the olden days." But all it will take is a major disaster to cause the breakdown of social systems such as waste collection, water treatment, immunizations, and pest control, and all these "old" diseases can have a resurgence that we've never experienced. The one natural defense we have going for us that most people in times past didn't have is plentiful nutrition. Disease always strikes malnourished people the hardest. Eat your protein and your vegetables!
My only criticism of this book is that it is kind of long-winded, and the author repeats himself a lot in a very circuitous manner. It seems like he could have made the timeline a little more straightforward. So far my favorite book on this subject is Guns, Germs, and Steel by Jared Diamond.