Just curious - In trying to research more about the effects of PG, I ran across this 2008 study: http://healthnz.co.nz/RuyanCartridgeReport30-Oct-08.pdf which includes the following on page 5:
Method.
Results.
wards without PG, and 5 in wards with PG vaporization, with rates of 0.18 per week and
I'm fascinated with the idea that this could actual provide positive benefits or some form of protection. Since you would expect improvement just from smoking cessation, we couldn't really discern the role of PG inhalation - But maybe some long-term, veteran vapers have noticed they seem to avoid these types of illnesses while non-smokers around them don't?? Like when everybody in the house comes down with a cold or the flu, but you don't (and perhaps you always did before)?
Inhalational safety in children.
In a series of experiments to control airborne infections,
over 105 children were subjected to bactericidal concentrations of propylene glycol in the
wards of a childrens convalescent home in experiments conducted over 3 years.
over 105 children were subjected to bactericidal concentrations of propylene glycol in the
wards of a childrens convalescent home in experiments conducted over 3 years.
Method.
Six wards of the Childrens Seashore House in Atlanta containing 105 bedfast
children aged 3 to 15 years were divided into 3 control and 3 undergoing vaporization for
3 week periods with 2 to 3 days between, before the control wards become vaporized, and
the vaporized wards became controls. This rotation continued for 7 months. The PG was
heated to vaporize it, but not above 80 degrees C, and vaporization continuously
maintained a concentration of 0.069 mg per liter. (0.07 ppm)
children aged 3 to 15 years were divided into 3 control and 3 undergoing vaporization for
3 week periods with 2 to 3 days between, before the control wards become vaporized, and
the vaporized wards became controls. This rotation continued for 7 months. The PG was
heated to vaporize it, but not above 80 degrees C, and vaporization continuously
maintained a concentration of 0.069 mg per liter. (0.07 ppm)
Results.
No ill effects were reported. In the first year, 100 infections occurred in control
wards without PG, and 5 in wards with PG vaporization, with rates of 0.18 per week and
0.09 per week respectively. Most of the upper respiratory infections in control wards
were common colds, suggesting the PG is also virucidal.