Re: Jogging in the Winter?
Dress in layers, so you can take something off once you start sweating. Warm up, don't run with cold stiff muscles. If you actually do get sick, take a break from exercising until you feel better.
Other than that, there's nothing wrong with running in winter. I've exercised outdoors when the temperature was -20C or colder, and never taken harm from it, as long as I dressed properly.