Mercyhealth and RJ Lee Group of Pennsylvania have completed their research to help develop a real-time, non-invasive breath test for COVID-19. The test would provide results within seconds instead of days or weeks. âThis is truly a novel approach to COVID testing, as itâs neither targeting antigen or antibodies, but rather physiologic changes of infection,â said Jonathan Wistrom, a scientific consultant for RJ Lee Group and operator of Practical Sustainability, a chemistry consulting firm based in Missouri. Individuals being tested for COVID-19 using the gold standard nasopharyngeal swab test (or PCR) at Mercyhealth North were asked if they would like to participate in the study.