Wow. From the most basic to the most advanced..
$1:
Two women in China have achieved the dubious honor of being the first humans to be killed by nanotechnology. The women, who worked in a poorly ventilated factory spraying a paint that contained nanoparticles, reportedly inhaled the particles over a period of months. The tiny compounds infiltrated the workers' lungs and skin, causing lung damage, fluid buildup, and eventual respiratory failure. Five other women have been hospitalized for the same condition.
Reuters quotes Yuguo Song, a Beijing toxicologist whose report appeared in European Respiratory Journal: The particles' size "means that they can penetrate the body's natural barriers, particularly through contact with damaged skin or by inhalation or ingestion," and once they've entered lung cells they cannot be removed.
http://www.popsci.com/environment/artic ... fatalities