The eight Wisconsin teens had become so short of breath that they needed to be hospitalized. Although the cause of their lung injuries remains to be determined, the teens had one thing in common: All reported vaping in the weeks and months before their hospital stays in July. The health department’s investigation into these cases has just begun. But vaping as a culprit isn’t a stretch. With more adolescents using JUUL and other types of electronic cigarettes, sometimes frequently, “it is not surprising” that we are starting to see some children developing lung injuries, says pediatric pulmonologist Sharon McGrath-Morrow of Johns Hopkins University School of Medicine in Baltimore. “Studies already have reported more chronic respiratory symptoms and more severe asthma symptoms in adolescents who vape,” she says.