The computer virus stuxnet has been shown to be able to unlock computer controlled locks in prisons.
Annual flu viruses infect 20% of Americans, hospitalize 200,000, and kill about 36,000.
Each year, an average of 20,000 children under the age of 5 are hospitalized because of flu-related complications.
Researchers estimate that if everyone routinely washed their hands, a million deaths a year could be prevented.