Vaping Does Not Appear To Be Toxic To Human Airway Tissue

These guys took samples of throat and lung cells and exposed them to hours of cigarette smoking vs vaping. Every hour, an average of 20% of the cells exposed to cigarette smoke died. Tissue exposed to vaping was just as viable as the control tissue (tissue exposed to lab air).

http://www.sciencedirect.com/science/article/pii/S0887233315001228