A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. CBS Evening News Facebook Disposable vape use falling in UK ahead of government ban Tobacco is Changing: E Cigarettes Wisconsin Department of Health Services New study finds disposable vaping devices more toxic than traditional cigarettes Study: Partial Flavor Ban on Vapes Had Addiction Consequences for American Students UW CTRI UWMadison