Israeli scientists are testing a new ultra-fast gargle-and-spit test for coronavirus on hundreds of patients, and report that so far it is proving 95-percent accurate. The developers have built a USB-powered machine the size of an ashtray, which takes just one second to conduct light analysis of mouthwash that a patient has gargled. They are about halfway through a trial of 400 people at Israel’s largest hospital, Sheba Medical Center, and say that if accuracy levels continue to impress, they expect it to become available internationally by the end of the year. The innovation team, drawn from Sheba and the...