Granted, you're perfectly healthy. You have every white blood cell available to fight all types of diseases. You'll never get a cold again. However, driving to work tomorrow a logging truck rolls over and you're half crushed by a log inside your car. You're now a paraplegic and confined to a wheelchair for the rest of your life. But you'll never get the common cold again.
I wish that I had that computer from Wired Science to make any gorgeous girl from the internet come alive.