Both my wife and child have gotten Lyme (here in central Massachusetts).. They almost never go anywhere except from the house to the car.  I do all the yard work, I spray this on my pants and cloths.. no problems yet.  I was recommended by a bird banner my mom talked to up in Maine who spends almost everyday in the woods.  She said she only has to put it on her cloths every few weeks, it can go thought the wash a time or two and still not have to respray.