I found this 2021 article from Wed MD: https://www.webmd.com/lung/features/cbd-oil-lung-disease
I also found some comments from our Mayo Clinic blog posted back in 2017
https://connect.mayoclinic.org/discussion/cbd-oil/
I hope this helps shed some light on the subject. My concern is quality control since many are taking advantage of the popularity of CBD. It is so important to buy from a reputable company.