Most cases are in Northeast and Midwest U.S.
We're all familiar with concerns about Lyme disease, but where does it come from?
Marten Edwards is a professor of Biology at Muhlenberg College. He studies ticks and tick-borne diseases. "Lyme disease is spread by one kind of tick: the black-legged tick or the deer tick." The tick picks up the bacteria from white-footed mice that live in the forest.
