Meliss-Look at the BRIGHT side. It could be just the thing to make you stand out in their memory!
Honestly, I'm a March cold person...every year! What we do is take a contact at the FIRST sign. If you KNOW you always get sick, watch for the signals like a scratchy or dry throat and take something then, not later.
I agree with getting plenty of rest and taking herbs and vitamin C (Just be careful of drug interaction when you take herbs). Be sure you start well in advance, like 3 weeks prior to recruitment.
edited-Heck, you should be taking your vitamins anyway! Go out and get some. Also, the best defense is to wash your hands frequently and LIMIT the exchange of saliva!!!