Although Lyme disease cases have been reported from all 50 states, these reports reflect where the patient lives, which is not necessarily where he or she became infected. In truth, infected ticks of the type that transmit Lyme disease are only found in certain states. In these states without infected ticks that spread Lyme disease, infections are usually the result of travel to a state where the disease is common, especially states in the northeast and upper Great Lakes regions. (Click here for a map of reported cases). Ticks transmit diseases other than Lyme disease, so you should know how to protect yourself no matter where you live. (Click here for ways to protect yourself).