Even though communicating risks to consumers can be challenging, the public's perception of safety will be paramount in determining the acceptance of nanomaterials.

CNN: Study the use of nanoparticles in food

The drug has suffered because of concerns about safety and also the perception that the 40-mg top dose of Crestor is no better than Lipitor's 80-mg top dose.

FORBES: Magazine Article

But Marian Sheridan, coordinator for health and safety for Wisconsin's Fond du Lac school district, counters that it is a "false perception" that schools and parents know which kids need help.

WSJ: Will Students Take a Mental Health Test?