VAPING “significantly raises” the risk of chronic lung diseases such as asthma and bronchitis, a study shows.
Current and former e-cig users were 1.3 times more susceptible — half the rate of fag smokers.
But people who smoke and vape face more than triple the risk, a University of California study of 32,000 adults showed.
A spokesman said: “Dual users are worse off than tobacco smokers.”
Prof Glantz, of Univesity of California, San Fransisco’s Centre for Tobacco Control Research and Education, said: “Switching from conventional cigarettes to e-cigarettes exclusively could reduce the risk of lung disease, but very few people do it.
“For most smokers, they simply add e-cigarettes and become dual users, significantly increasing their risk of developing lung disease above just smoking.”
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Chemical testing showed that e-cigarettes contain higher levels of certain toxic chemicals than conventional cigarettes.
But the new study shows that those are not the only health threats posed by e-cigarettes.
Prof Glantz added: “This study contributes to the growing case that e-cigarettes have long-term adverse effects on health and are making the tobacco epidemic worse.”
