And thirdly, the virus dies the quickest in the presence of direct sunlight under these conditions. And when you--when you look at that chart, look at the aerosol as you breathe it; you put it in a room, 70 to 75 degrees, 20 percent humidity, low humidity, it lasts--the half-life is about an hour. But you get outside, and it cuts down to a minute and a half. A very significant difference when it gets hit with UV rays.