The HyGreen system reminds hospital staff to wash their hands, and keeps track of who doesn't. A quick scrub could keep staff from spreading germs that lead to nearly 2 million in-hospital infections a year. A HyGreen sensor sends a wireless "all clean" signal to a badge worn on a person's shirt pocket.
After cleaning their hands with alcohol-based sanitizers, doctors and nurses place them under the HyGreen sensor that sniffs for alcohol, which kills 99.99 percent of germs, and sends a signal to the badge.