Vaping linked with long-term risk of respiratory disease in new study - CNN
Meanwhile there's this:
Health effects in COPD smokers who switch to electronic cigarettes: a retrospective-prospective 3-year follow-up
^^^ I'll take this one with a grain of salt.said Stanton Glantz, senior author of the study
Meanwhile there's this:
Health effects in COPD smokers who switch to electronic cigarettes: a retrospective-prospective 3-year follow-up