Well, this may not help much at the moment if you've already caught a cold - but washing hands frequently, and not touching your face/mouth/nose when you're out helps a lot. I've been washing my hands much more in recent years and have caught very few colds. I also make a point of not touching my face when I'm out - if I"m on the bus, for instance, I remember to keep my hands down. It really seems to help. My colds have gone down dramatically.....

Take care,
ErinBear