doi: 10.1097/MCO.0b013e328361c8b8
They are designed to trap 99.97% of airborne particles as small as 0.3 microns, making them an excellent choice for filtering out fine particulate matter from wildfire smoke
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The use of e-cigs has already been studied in a previous American longitudinal study, the PATH study [13], where, among 2,932 e-cig users at the baseline survey, 18% at the follow-up survey reported positive results (having stopped smoking and/or using e-cigs), versus 38% who reported negative results (having relapsed smoking), while a 44% had not recorded significant changes, since they continued to use the products they used in the baseline investigation
Pepper, a postdoctoral fellow in the UNC Gillings School of Global Public Health