Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. Baltimore County Health Department Warns of Harmful Vaping Products The Eye of the Bluebird Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Secondhand smoke and aerosol Vaping toolkit