In the midst of the pandemic, smoking vaping cessation is even more important. But it is also important to know that not all patients who develop COPD have a history of smoking. Practice Nursing How safe are e cigarettes for patients with COPD? A systematic review Practice Nursing Frontiers B cell immune repertoire sequencing in tobacco cigarette smoking, vaping, and chronic obstructive pulmonary disease in the COPDGene cohort Association of electronic cigarette use and risk of COPD: a systematic review and meta analysis npj Primary Care Respiratory Medicine