roadrunner84 said:
I was running 5 or 6 days a week until I woke up with a stinking cold AGAIN

Why is it that happens as soon as I'm getting somewhere??
The sad (but unfortunately true) fact is, RR, that the fitter you get... the nearer you are to being injured or becoming ill. That's running, I'm afraid. There's a very fine line between being on top of your game and "going over the edge". Sometimes it's possible to "balance" on that knife-edge; but the trick is in being able to recognise when you're there and adjust your running (maybe back-off a little?) accordingly.
I must admit to having something of a paranoia regarding colds and the like. What I'm about to add is rather controversial and is bound to provoke some conflicting posts... I'm not recommending this course of action, merely relating my own personal experience...
... Whenever I so much as
suspect that I'm coming down with a cold, I deliberately "overdose" on Vitamin C. (Actually, I don't think it's technically possible to overdose on vitamin C, as the body is unable to store it in any significant amount. It's water-soluble, and is passed out in urine, so it's constantly being flushed from the system). Anyway, I'll take up to 4000mg of the stuff throughout the day in liquid form, so that I can spread the dosage out evenly, rather than flooding the system all at once.
I've heard of several scientific reports which claim that Vitamin C has little or no influence on boosting the immune system; and that too much of it is harmful... but I've been successful (more often than not) over the past 20 years or so, in fending off colds if I've been able to spot the symptoms early enough. However, some forms of the common cold (and 'flu, generally) are just too virulent to be beaten back by vitamins; so there isn't a 100% success rate.
Maybe there's something in the fact that I
believe in the method that aids my cause. It doesn't matter, if it works!
WARNING: HIGH DOSES OF VITAMIN C CAN ACT AS A DIURETIC (dehydrate the system).