Same thing with whitetail fawns.I seen a documentary about the tick's on moose and their calves. Adults can usually withstand a tick infestation but calves have a very difficult time dealing with the blood loss.
Years ago my taxidermist put a deer hide into the freezer for a month, pulled it out and anywhere that they crawled into a crease they were still living. It actually took 3 months to kill all of them!
As someone mentioned above clothing treated with sawyers permethrin is the best thing I have found. A 10 minute spin in the dryer on high will make quick work of dispatching the little disease carrying blood suckers.
I suspect fawn mortality is going to be pretty high this year