You know what bacteria/viruses really hate? Temperatures over the boiling point of water. Trying to convince me that they can thrive is what is basically an oven (Atomizer) seems ill informed. It might be an interesting experiment to create a culture of what remains alive in a wicked RDA after 10 minutes of chain vaping, but my intuitive guess would be nothing. Is there evidence of elderly patients getting sick from their COPD vaporizer treatments? If even slightly possible I think that would be greatly known. Can such flora even be transmitted via steam? …I mean outside of some deep sea volcanic vent.
@Amy2? get right on that RDA culture !
Also it is my understanding only ONE person ever contracted/died from “popcorn lung” and they all-but-swam in artificial butter vapor for years. Most here would agree the D/A/P scare is fueled by greed at Big Tobacco and only a thinly veiled and false interest in Public Health. How can you be sure? Well once vaping is taken over by BT we’ll hear loudly about how much safer vaporization is over combustion (and we recently saw exactly that) …I mean we already know by personal experience, but this Truth will be stifled until they (BT) own it.
On PG… like things such as Latex Gloves (surgeons), this can be an issue about “exposure”. You friend may have developed a sensitivity to PG over time on the basis of repeated exposure …a known issue, but exacerbated by the high 50/50 VG/PG ratios of much commercial juice. Many folks here are into DIY to modify their own PG sensitivity issues. Kudos to the OP for spending some time researching …never stop. If your friend has any real evidence WE (ELR) will be the first people interested!
We learned recently (video) that Minty vapes are harsher on lung tissue that other flavors. Did he prefer minty vapes? I think your friend may be conflating his own health status with whatever he can get his brain to grasp …this is Human Nature. However, Opinion is not Science. Still, its not your job to enlighten, and you could even damage that friendship trying to inflict him with facts. Keeping that friendship might be preferable to being right. Hey? Best advice? He quit smoking and quit vaping? Win Win. Instead offer some congratulations …we ain’t vaping Kale out here …everyone might be able to agree Vaping is a health risk.