The deadly coronavirus that has infected over a million people across the world can only be prevented by using masks. Time and again doctors told about the same. Watch the video how the virus spreads while breathing and coughing without a mask. But the virus slows down if someone wears a mask. It is essential to wear a mask as the coronavirus pandemic has infected more than 1 million across the globe out of which 50000 died. In India, the number of covid-19 cases crossed over 3500 and death toll surges past 100.