California recalls cannabis vape months after it was told of contamination Los Angeles Times Medical Marijuana Vape Pen: A Discreet and Fast Acting Option for Everyday Relief Is vaping safer than smoking? A pulmonologist weighs in. Vaping and Serious Illness: What You Need to Know Together by St. Jude Does e cigarette use increase the risk of cancer? Vaping Possible Negative Effects on Lungs: State of the Art From Lung Capacity Alteration to Cancer Cureus