Healthcare Aerosol microdroplets ineffective at spreading coronavirus: Study Updated : October 28, 2020 12:04 PM IST In the research, the scientists used laser technology to measure the distribution of droplets released when people speak or cough. Test subjects spoke or coughed into a laser beam, and a jet nozzle was used to mimic tiny aerosol microdroplets, the researchers said. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.