Question: how rare is it to get popcorn lung from vaping?
Answer: Popcorn lung is an extremely rare lung disease, and it's hard to say with certainty how common it is among people who vape. A study published in 2015 reported that more than 90 percent of e-cigarettes tested contained either diacetyl or 2,3 pentanedione (another harmful chemical known to cause popcorn lung).