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21: MDPI

Smoking, passive smoking and histological types in lung cancer in Hong Kong Chinese women

While e-cigarette vapor does include some of the same chemicals found in cigarette smoke, the levels of these chemicals are many-fold lower than found in cigarette smoke.21,22 So while e-cigarettes are not 100% safe, the risks are surely far lower than the alternative of inhaling cigarette smoke.23-25 It is also worth noting that several studies have found that smokers who switched from cigarettes to an e-cigarette had significantly improved lung function and lower risk of airway infection, which would be clinically important for someone with lung cancer.26-30 Fourth, many smokers prefer e-cigarettes over other aids to quitting

Then, the animals were exposed to ambient air for one minute