Something to think about before you flush - you might just be helping to spread COVID-19. A new study out of China found that flushing public urinals can potentially spread coronavirus, thinks to an "alarming upward flow" that can send water droplets two feet in the air in just a few seconds. Researchers say those droplets can end up infecting the flusher - or the next person in line. They recommend always wearing a mask in public restrooms.