Vaping could be more dangerous than previously believed, according to a new study. Published in the respiratory journal Thorax, the study found that the vapor from e-cigarettes may cause inflammation and impair certain cells responsible for clearing bacteria and allergens from the lungs.

The study looked at eight non-smokers who vaped over a 24-hour period. The study's lead author, Professor David Thickett, said, “[E-cigarettes] are safer in terms of cancer risk, but if you vape for 20 or 30 years and this can cause COPD [chronic obstructive pulmonary disease], then that’s something we need to know about.”

He added, “I don’t believe e-cigarettes are more harmful than ordinary cigarettes, but we should have a cautious skepticism that they are as safe as we are being led to believe.”

What do you think of the findings? Do you vape? Let us know in the comments below.

In other news, here’s your first look at Nike’s Virgil Abloh-designed Serena Williams collection.