"Ticks can carry numerous diseases that they can transfer to humans. Some of the better-known tick-borne diseases are: Rocky Mountain Spotted Fever, Lyme Disease, anaplasmosis, and Ehrlichiosis, but there are several others. There is no vaccine to protect you from the vast majority of these diseases. Complications of tick-borne diseases can be life changing or even result in death."
http://www.dailystatesman.com/story/1994726.html