The first is in the very reputable Journal of Physiology and appeared the most user-friendly of science articles on vaping. The abstract is well written, providing a useful summary of this review.

The second is from the Australia lung foundation and particularly written for general consumption.

https://physoc.onlinelibrary.wiley.com/doi/10.1113/JP279754

https://lungfoundation.com.au/lung-health/protecting-your-lungs/e-cigarettes-and-vaping/

Best wishes

Mary MacGibbon