COVID-19 Detector: COVID-Detector in Kolkata
Corona spreads in the air. In that case, if you do not enter the room where there is no corona in the air, you can avoid corona a lot! But how do I know, the presence of corona in the air?
Corona spreads in the air. In that case, if you do not enter the room where there is no corona in the air, you can avoid corona a lot! But how do I know, the presence of corona in the air?
