Should I Be Concerned About Secondhand Vaping? Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect The health risks of secondhand smoke are widely understood. But what about secondhand vaping? New research: Second hand vaping is NOT harmless A recent study published on PubMed is raising serious concerns about the health effects of second hand exposure to e cigarettes. People exposed to second hand Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Does Vaping Cause Secondhand Smoke?