Statement: There are no long-term studies of the dangers (if any) of
vaping. That's because it hasn't been around long enough for there to BE any studies. There are, however, some intial studies that show that
vaping is...at the very least, significantly less harmful than smoking. There are ample studies that show that analogs contain a number of carcinogens and are responsible for a range of health issues, not only for the smoker but for others exposed to second-hand smoke.
Speculation: I don't know if there were any specific studies about the effects of 'second hand vape' or not so far, but it stands to reason with the fact that it is primarily water vapor and dissipates swiftly leaving little to no trace...that it shouldn't be harmful in any meaningful fashion. There may be some conclusive proof out there, but the anecdotal evidence indicates that there is little reason for any ill effect to be felt by anyone exposed to
vaping. The large amount of anecdotal evidence and several published studies found here and elsewhere indicates that vaping is better for you than analogs in several respects....but it should still not be considered 'safe' just 'safer.'