A Google search on "bloodstream nanobots" yields thousands of results and just on the first page, many results of blog posts that date back to 2009. It is nearly 4 years later.
I've had no luck in finding any information on actual APPROVAL of these bots.
Are there any countries at all who have approved this? People seem to have talked about it like crazy 4 years ago, yet, we're still not seeing anything.