E-cig Flavors (IMAGE) University of North Carolina Health Care Caption Human cells exposed to two kinds of e-cig flavored vapor and PG-VG non-flavored vapor at high doses. Green indicates live cells; red indicates dead cells. Credit Tarran Lab, UNC School of Medicine Usage Restrictions credit properly License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.