http://www3.niaid.nih.gov/topics/lymeDisease/PDF/LymeDisease.pdf
National Institute of Allergy and Infectious Diseases, National Institutes of Health
In the early 1970s, a mysterious clustering of arthritis occured among children in Lyme, Connecticut, and surrounding towns. Medical researchers soon recognized the illness as a distinct disease, Lyme disease, which is transmitted by ticks.