Infectious diseases have been with us for millennia and continue to pose a threat from the irritation of flu season to the potential extinction of our species.We instinctively fear them and alter our behaviour as a result. The reason we bury bodies six feet deep is because that was the depth that stopped plague transmission from the dead in the Middle Ages. Many religious practices such as avoiding certain meats were established because of foodborne disease transmission.In The Top Ten Diseases of All Time Stacey Smith presents the top ten deadliest diseases and their effects on society providing a wealth of information about the trajectory and terrible impact of each disease humanitys reaction to these diseases throughout the millennia.Did you know for example thatThe medical symbol evolved from the worms wrapped around a stick because that was the only way to remove Guinea worms from the body so having a stick meant you were a doctor.Smallpox is the thirdworst disease ever yet it remains the only successfully eradicated human disease but not for long thanks in part to a successful vaccine in part to photographic recognition cards and in part due to helicopterled forced vaccinations of whole villages in the former Yugoslavia.