In the late 1950s, dentist and US Navy Capt. “For decades, saliva was considered a stepchild of blood,” says chemist Chamindie Punyadeera, who spent a decade working on Viome’s saliva diagnostic test. “The goal of saliva diagnostics is to develop rapid, noninvasive detection of oral and systemic diseases,” write dental scientists Taichiro Nonaka of Louisiana State University and David T.W. …