My experience has been that going outside in the cold (-15C) with only minimal layers of protection did not cause a cold. I did however notice how, if I was sit

My experience has been that going outside in the cold (-15C) with only minimal layers of protection did not cause a cold. I did however notice how, if I was sitting in a hot bus next to the cold window, such that only part of my body was cold (like the right arm), I would start to feel ill.