Simah Herman, 18, became an anti-vaping advocate after surviving a severe lung illness that caused her to be placed in a medically induced coma – one of several recent incidents linked to vaping. WATCH NIGHTLINE EPISODES: https://abc.go.com/shows/nightline ALSO AVAILABLE ON HULU: https://hulu.tv/2wSmSrZ #Nightline #SimahHerman #MelaniaTrump #Vaping #ECigarettes #Smoking #FlavoredNicotine #THC #Oil #Health