بدین ترتیب اگر کسی قرار باشه عسطه کند، هوا چندین بار چرخش کرده قبل از اینکه بتواند از طریق فیلتر بیرون رود. 
So if someone were to actually sneeze, that air would get swirled around multiple times before it even has a chance to go out through the filter. 