I am super anxious to run again but this plague of a cold I'm fighting has prevented me from doing anything but moan and leave wads for Kleenexes around the house - something the hubby appreciates. "Ugh, I just realized I slept with two of your Kleenexes on my pillow."
Even though I make him sleep with my snot (yay, marriage!), he never gets sick. Ever. I'm the one taking a regiment of vitamins, running often and avoiding junk food. However, it appears a diet of peanuts and candy corn are what really keeps the doctor away. Screw the apples.
Regular, moderate running does boost your immune system but running more than 90-minutes at a time leaves the immune system flailing about. Not fair!