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Thanks to NJOY for the infographic below.

To further assess the effect of CSE on epithelial barrier function, we treated the A549 cell line, the RPMI2650 human nasal epithelial cell line, the BEAS-2B human bronchial epithelial cell line, and the MLE12 mouse lung epithelial cell line with CSE and measured their transepithelial electrical resistance (TEER)

If traditional e-cigarettes are the easiest vaping devices to use and theyre available in the same stores where youd ordinarily buy tobacco products why dont all vapers use those devices

Each one has a small battery inside, so they count toward the battery limit