Very good. I take it to say, that second hand vapor is basically harmless by the usual standards and, if
vaping is harmful to anyone at all, it's to those of us that do vape and, that is very different than any harm to bystanders - it is our choice to use nicotine and, inhale rather large quantities of PG and/or VG vapor and, it's still a lot better than smoking for us.
Now if further studied bear that out, it's a live and let live situation. If it harms us at all, it's our choice and, we aren't harming anyone else as we were with our second hand smoke when we smoked (or would be if we had chosen smoking over
vaping for those that never smoked.)
Pretty much what I figured anyway and, I doubt they will find any long term exposure problems given the prevalence of both PG and VG in so many other, commonly used products that have been in use for decades. Okay so we inhale more of the stuff but, I'd bet that it is easily possible to get just as much into your body one way or another without vaping. (Eating, using air fresheners and sanitizers, lotions, cosmetics, beverages, etc...)