Fluid Dynamics of Sneezing With Implications for COVID19 Spread – This close-up view of a sneeze filmed at 2000 frames per second (duration 0.25 sec) shows it’s a hot, moist, turbulent gas cloud containing air and mucosalivary droplets that travel as far as 26 feet (7-8 meters) . Current social distancing recommendations for the COVID19 pandemic specify 6 feet of separation. The physics of sneezes and coughs have implications for respiratory pathogen transmission and mask and respirator design. Click our bio link for a complete discussion (Ah-CHOO!) -Video courtesy of Lydia Bourouiba. Used with permission.