Professor Eli Schwartz of the Center for Geographic Medicine and Tropical Diseases at Sheba Medical Center and Erez Lev, from Israeli firm Newsight Imaging, hold a device used in ongoing clinical trials together with a newly developed saliva test which they say aims to determine in less than a second whether or not you are infected with the coronavirus disease (COVID-19), at Tel Hashomer in Ramat Gan, Israel August 13, 2020. REUTERS/Ammar Awad