Should I Be Concerned About Secondhand Vaping? Vaping might feel safer than smoking but whats really happening inside our lungs?, The EVALUATE study led by the @unibirmingham will be the first to track ex smokers over a whole year to uncover Secondhand vape exposure: Risks and side effects 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.