ca tobacco tax 2019 California use fact sheet Report 2019-046

After about one year, researchers documented respiratory symptoms in 10.7% of those who did not use e-cigarettes or tobacco cigarettes, 11.8% of those who only use e-cigarettes, 17.1% of exclusive tobacco smokers, and 19.7% of those who both vaped e-cigarettes and smoked tobacco cigarettes

The main exclusion criteria were a history or presence of clinically significant disease or disorder that, in the opinion of the Investigator, would have jeopardised the safety of the subject or impacted the validity of the study results

That exposure can create a ripple effect of negative consequences that persist into adulthood, said study author Dr

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