There was a fatal incident a few years back in the Arctic (oil or support staff). A woman who went jogging outside the camp like 3 miles or so and was attacked by an allegedly lone wolf and killed. There were no witnesses, but the body proofed wolf attack.
I agree, that is very RARE..I have seen pack of 4 wolves at very close proximity and they could not be bothered with humans even though I had a dog with me, but I held him by my side.