Figure 1. Serial photographs of a sneeze extracted from the video image.

Original (upper rows) and enhanced (lower rows) images of the sneeze of a healthy adult male volunteer. The photographs were extracted from the video image recorded by a digital high-vision, high-speed video system at 0.01 s and every 0.05 sec. The mist of the sneeze advanced forward as a mass, associated with gradual diffusion and fading followed by disappearance. A part of the mist cloud looked swirled in the peripheral area (arrows).