The CDC has information on another tick-borne disease besides Rocky Mountain spotted fever and Lyme. It is called the Powassan virus. Most of the occurrences have been in the Northeast and in the Great Lakes region. Here is a little more info from the University of Wisconsin-Madison.
The ticks on my screen were what we call dog ticks, but a couple of the ones that have bitten me this year are what we call deer ticks.
Here is a close-up of one on my screen door.
If you are outdoors a lot, keep yourself checked for ticks.