A recent study has shown that giving yourself regular exercise will give you a stronger chance of fighting nasty flus or colds (http://www.reuters.com/article/idUSTRE59M4H620091023). This makes sense, keeping your health levels up by exercise isn’t something new, although I did find it interesting they did it in mice…. I guess you cannot give this kind of test (infect humans with the flu) without major repercussions.
As anybody that follows what I write will know, I am a very big advocate of keeping healthy through regular exercise. This not only fights short term colds and flus, but it also works over the long term that stretches into your old age and promotes a long life. If your like me and am nervous about getting old, I use this as motivation.