A Breathalyzer for Disease

A team at JILA say they have produced one.

It has been well established that people exhale a complex mixture of gases, including oxygen, nitrogen, carbon dioxide, and others, Ye told ABCNEWS.com. In fact, more than 1,000 different compounds are contained in human breath. But along with those common gases and compounds, people also exhale certain molecules that are considered "biomarkers" indicating specific conditions, such as diseases.