Potential impacts of climate change on the transmission of Lyme disease include: 1) changes in the geographic distribution of the disease due to the increase in favorable habitat for
ticks to survive off their hosts; 85 2) a lengthened transmission
season due to earlier onset of higher temperatures in the spring and later onset of cold and frost; 3) higher
tick densities leading to greater risk in areas where the disease is currently observed, due to
milder winters and potentially larger rodent host populations; and 4) changes in human behaviors, including increased time outdoors, which may increase the risk of exposure to infected
ticks.