IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-1-33040 Original Research Paper A controlled clinical study to evaluate a proprietary Non-Invasive Smartphone Based digital biomarker Tool Lyfas® in enabling early detection of COVID-19 infection among asymptomatic individuals Das Dr. Dr. Pooja Sharma Dr. Dr. Madhur Shrivastava Dr. January 2021 10 1 01 02