Canadian Scientists have created Nanorobots, that not unlike G.I. Joe's Nanomites, that "can travel down the bloodstream to administer drugs precisely by targeting a tumor's cancer cells."
The advantages of injecting the tiny robots are that the medicine doesn't injure other organs and tissue, but is deposited exactly where it's needed. The dosage of drug needed could even be reduced, decreasing the toxicity inside a cancer patient's body, which is good all-around.
For an explanation of the cool technology, go here and check out this video:
Let's just hope they don't go rogue and try to destroy Paris.