The impact of electronic cigarette use on chronic obstructive pulmonary disease: A systematic review and meta analysis Respiratory Medicine While vaping is not risk free, it is less harmful than tobacco Our World in Data Comparing E Cigarettes and Traditional Cigarettes in Relation to Myocardial Infarction, Arrhythmias, and Sudden Cardiac Death: A Systematic Review and Meta Analysis Mohammed I. Yacoub, Aziz Aslanolu, Fadi Khraim, Anas Alsharawneh, Raghad Abdelkader, A systematic review and meta analysis of the association between e cigarette use among non tobacco users and initiating smoking of combustible cigarettes Harm Reduction Journal Springer Nature Link