Checkout my post on how to get rid of colds and flus withing days on my blog:
For the lazy ones, here is the cliffnotes:
1) Wash your nose and troath with Vitamin C water.
2) Get a Vitamin C and Gamma Globulin injection
3) Eat 3000-4000 mg Vitamin C daily.
You can cut days on your downtime if you do especially 1+2.
The hardest part is getting your doctor to give you a Gamma shot, but its incredibly effective.