Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Vaping not prior smoking is associated with changes in gene regulation linked to disease Smoking vs. Vaping: Is One Really Safer Than the Other? What science says about vaping risks The Examination Vaping vs Smoking: Effects and Tips for Protecting Your Lungs Max Hospital Does Vaping Cause Lung Cancer?