Dude, I was just telling Cyn in chat to take this stuff:
LINK My grandma takes that stuff when she feels a cold coming on and she hasn't been sick in over 50 years. I started taking it a few months ago when she told me about it and I haven't been sick at all since then. I also take a multi-vitamin everyday, as well as Ester-C (really good vitamin C), a vitamin B complex, and powdered vitamin C mixed with water (it gets through your system faster and works better than vitamin C capsuls).
Go to that above link and shop their store. It's got a lot of really good prices, and Grammy says their store brand is as good as the brand names. She owned her own health food store for years, has a degree in nutrition and, like I said, hasn't been sick in over 50 years, and she's 82 now.