Coronavirus or COVID-19 is a pandemic in the present world. We all know this name. What is a virus? Where does it come from How is it made? lets startCoronavirus or COVID-19 is a pandemic in the present world. We all know this name. What is a virus? Where does it come from How is it made? lets startCoronavirus or COVID-19 is a pandemic in the present world. We all know this name. What is a virus? Where does it come from How is it made? lets start