Perhaps I can open yours to consider other viewpoints than yours.
Here is my take on the issue. The idea is that genes expression are consistently modulated due to extracellular changes in the ever changing micro environment (temperature, pH, chemicals, infection, activity, rest, digestion, type of food etc...) but the expression rarely or even never goes in the same direction for all. Now, what do we have in our vape:
- PG and VG are immunologically inert (some folks can have sensitivity though). PG is used in vaccine formulation, so there is no chance that it can impair immunity or it would affect the vaccine efficacy. PG may also facilitate the immune system job in case of infection because it has known anti-germicidal activities.
- Nicotine is a proven anti-inflammatory substance. So, we can accept that it can decrease the expression of some "Immune genes" (whatever that means, 100 of thousands of genes fall in this category). Also, nicotine is used as an effective treatment for inflammatory conditions like Crohn's disease.
We only have left:
- Flavors and specifically cinnamon flavor in our case. Cinnamon is known to have anti-oxidants (polyphenols and proanthocyanidins), recommended in our diet it is believed to have beneficial effects on our immune system. Now to be through, various inflammatory conditions have been treated effectively with cinnamon for centuries by traditional medical practitioners. So in fact, because of the antioxidants, cinnamon has also anti-inflammatory activities so we may expect that this flavor may also decrease the expression of "Immune genes" (inflammation been the innate arm of our immune system).
I'm giving some material to nourish our thinking and re-consider our Vaping vs Smoking debate. I'm now thinking that altogether, these hypothetical results in addition to current scientific knowledge suggest that vaping with specific flavors like cinnamon, may actually be good for the immune system in some instances, because it contains anti-inflammatory compounds, like anti-oxidants.
Even though the abstract claim, supported by no available data, sounds a bit scary, it elaborates on a process that is consistently ongoing in every cells of our body: the modulation of gene expression, "immune genes" been drastically influenced by extracellular factors, in amount, time and duration. Therefore, it's nothing to be afraid off but to consider with knowledge and intelligence!