NBC News with Lester Holt take an in depth look into the illicit THC cartridges that have caused the lung illnesses as reported by the CDC. These illegal THC vape cartridges have nothing to do with legal vaping. Legal vape shops do not sell illegal products. Nicotine vaping does not cause lung illnesses. Vaping legal nicotine products has been show to be 95% safer than smoking combustible tobacco according to the Royal College of Physicians at Public Health England. The Royal College of Physicians are a group of 35,000 doctors from around the globe.