Heather Potters is trying to get to the point. On a stage at Denver's Air & Space museum, a 182,000 square-foot space filled with decommissioned aircraft, she stands in front of a PowerPoint and describes her company's no-needle syringes, which can deliver vaccines by accelerating the liquid into a superfast stream that punctures the skin.

Learn about your ad choices: dovetail.prx.org/ad-choices