One of the greatest promises of nanotechnology has also caused the most upset; the application of nanobots in medicine. One proposal has been that nanobots aid or even replace our immune system. The purpose of this project is to discuss the pros and cons of this possibility, considering different levels of application. Nanobots would live in a person's bloodstream, and give an early alert to the individual's doctor should s/he contract some virus. his is the most likely use of nanotechnology in near-future medicine, since people will not trust the technology to do anything else. Advertising link removed by Moderator