Check out this comprehensive review from 2022 about vaping and health:
https://doi.org/10.1136/bmj-2021-065997

The last bit in its conclusion section states:
"The true impact of vaping on respiratory health will manifest over the coming decades, but in the interval a prudent and time tested recommendation remains to abstain from consumption of inhaled nicotine and other products."

The best is don't smoke at all