In the future...
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M$4 Answers
Are nano-bots the future? Yes, say scientists worldwide.
In the not-too-distant future, nanobots--miniature robotic devices--will be able to travel throughout the body, in the bloodstream, or other channels, and will receive commands and transmit data wirelessly. Nanobots would provide continual data on blood cell counts, oxygen content, blood pressure, pulse, etc. Medical professionals can monitor the data in real time to discover unusual events such as strokes, heart attacks, and physical injuries.
A scientific news report from the BBC:
http://news.bbc.co.uk/2/hi/science/nature/7288426.stm
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M$Nanotechnology is the next stage of development for humans. Nanotechnology could enable us to be able to manipulate cells in our bodies to any form we would like, the possibility of staying young and to live forever. Nanobots could be injected into our bloodstream to help our white blood cells fight of diseases, viruses etc.
cjd
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M$
Wikipedia has some interesting facts on Nanorobotics - http://en.wikipedia.org/wiki/Nanorobotics
Future Wikia also has information as well - http://future.wikia.com/wiki/Nanotechnology (it includes all forms of Nanotechnology)
If you want to ask another question feel free to contact me via my profile page at http://www.mahalo.com/member/cjd
For example, if we injected nano-bots that healed soldiers in battle, the enemy would invest time and money into synthetic viruses that could change those nano-bots so they destroy the host's tissue, effectively destroying large parts of the opposing army.
Although this is only one example, history shows that more advanced technology tends not to solve the problems that we want them to.
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What all this brings to mind is War of the Worlds, and how the aliens all die because they have no immunities.
So, for your run-of-the-mill diseases, I don't think so. But I can definitely see them being used for more exotic things.
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