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do e cigarettes cause health problems Harmful Effects of Vaping Chart Vaping and E-Cigarettes Causing Outbreak
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PMID 15914812

Interestingly, both traditional CS and EC use modified the oral microbiome, though with distinct effects

Bronchitis can also be caused by exposure to smoke, chemical irritants, or bacteria
More than that, cigarette smoking has been found to lead to a raft of conditions related to vision loss, such as age-related macular degeneration, cataracts, glaucoma, diabetic retinopathy, and dry eye syndrome

and China. One of those companies is Cool Clouds Distribution, Inc., which Bloomberg reported in February operated out of an unmarked building in Los Angeles Skid Row