A COVID-19 breath test just cleared a major hurdle: the FDA has authorized the first device that can detect the virus from a single exhale, returning results in about three minutes. Made by InspectIR, the device picks up a signature pattern of five compounds the body releases during infection, and in a study of nearly 2,500 people it correctly flagged 91 percent of positive cases. No swabs, no lab. Beyond this moment, the authorization is a real proof of concept for breath-based diagnostics — a field researchers have long hoped could one day help detect cancers, kidney disease, and other conditions, especially in communities where traditional testing is hardest to reach.