Most common e cig refills contain respiratory irritants, and people who smoke and use e cigs are more likely to experience respiratory symptoms ERS European Respiratory Society Outbreak of Lung Injury Associated with the Use of E Cigarette, or Vaping, Products Champlain Medical Older e cigarette users face increased odds of respiratory issues, study finds Vaping VAPI Maimonides Emergency Medicine Residency E Cigarettes, Vaping & Lung Health Pulmonary & Respiratory Care Loma Linda University Health