Electronic Cigarette Use in US Adults at Risk for or with COPD: Analysis from Two Observational Cohorts Journal of General Internal Medicine Springer Nature Link Are E Cigarettes a Safe Alternative to Smoking? Using Airway Cell Cultures to Assess Early Indicators of COPD Progression Inquiries Journal Analysis underscores the health risks of e cigarettes Pulmonary Increased risk of COPD observed in individuals using e cigarette: Study E cigarette or Vaping Use Associated Lung Injury (EVALI) American Lung Association Chronic obstructive pulmonary disease develops over decades and we are missing the window to prevent it