Doctors at the Mayo Clinic examined samples of lung tissue from 17 patients who fell ill after vaping nicotine or marijuana products.<br /> <br />Clip1-Google fair use<br />Clip2-Shutterstock<br />Clip3-Shutterstock<br />Clip4-Shutterstock<br />Clip5-Shutterstock<br />Clip6-Stringr<br />Clip7-Shutterstock<br />Clip8-Stringr
