Vaping, e cigarettes linked to 215 cases of severe lung illness in 25 states, including Pa., N.J. E cigarettes Found to Cause Change in Mouth Bacteria Which Could Lead to Gum Disease or Oral Cancer Respiratory Therapy Vaping may not contain tobacco, but that doesn't mean it's harmless. E cigarettes still expose your lungs to nicotine and a mix of chemicals that have been linked to lung disease, heart issues, Sixth person dies of lung disease linked to e cigarettes