The devices, popular among teens, emit lead, nickel and antimony at concentrations that may exceed cancer and neurological risk thresholds. How does the disposable vape ban work, and how harmful is vaping? Vaping exposes users to toxic metals like lead and uranium, study says Disposable Vape Ban: What You Need to Know Firechief Global E cigarette, or Vaping Product, Use Associated Lung Injury (EVALI) Fact Sheets Yale Medicine