The risk of exposure on a flight is lowered by 23 to 57 percent if middle seats are kept unoccupied, according to the study. But it did not look at what protection mask-wearing could provide.The risk of exposure on a flight is lowered by 23 to 57 percent if middle seats are kept unoccupied, according to the study. But it did not look at what protection mask-wearing could provide.internal-essential, Airlines and Airplanes, Coronavirus Risks and Safety Concerns, Heating, Ventilation and Cooling (HVAC), Coronavirus (2019-nCoV), Research, Kansas State University, Coronavirus ReopeningsRead More