Chennai, Apr 17 (ANI): A Chennai-based hospital invented unique way to diagnose COVID-19. With the help of NanoScience, KJ Hospital Research & Postgraduate Centre invented low-cost COVID detecting device. KJ COVID-19 tracker is a small equipment which resembles a normal human hand. It detects millivolt electricity when a person put his hand on the device. The whole process takes 3-7 seconds only. The overall efficiency rate of the KJ COVID -19 tracker is 98.2%.