Back in the mid-1990's they actually had a human vaccine against Lyme disease. It went by the wayside, I believe due to lack of sales. Nobody thought seriously enough about it to get it.
So now, my dog has a Lyme vaccine and I cant get one.
Just remember, ticks dwell in grass and on low bush, and they cant jump like fleas. They catch onto your leg (or your dog's leg or belly)and climb up. For a tick to get up under your arm, it first had to climb up past *ahem* everything else to get there.