Havent you read about nanotechnology vaccinations? Tell me what you know about it.

These are both part of the Gates Foundation's involvement in the "Grand Challenges Explorations" program which claims to be working to "achieve major breakthroughs in global health."

...breakthroughs like mass sterilization and nanoparticle vaccines that could be covertly administered even without your knowledge, it turns out. These nanoparticles could be used in a spray mist that's sprayed on to every person who walks through an airport security checkpoint, for example. Or it could be unleashed through the ventilation systems of corporate office buildings or public schools to vaccinate the masses. You wouldn't even know you were being vaccinated.
Just what I have read. Is it NOT TRUE that this will happen? Do you think this would/could never happen?