Hmm, sounding more and more like Mary Shelly was on the right path.

I still think the time will come when we will receive periodic injections of millions of nanites that will be able to do things like combat viral and bacterial infections, unclog arteries, identify and destroy cancer cells, repair ruptured blood vessels, etc. Maybe in another hundred years or so.

We are pushing the limits of biological remedy, like antibiotics and antivirals and steroids. The next big leap ought to be nanotechnology and cybernetics. Think of all the possibilities, even reproductive and psychological functions could be manipulated. Star Trek really wasn't that far fetched.