In secondhand vape, scientists smell risk American Heart Association Secondhand Smoke Vermont Department of Health Health experts say not to 'vape' around children, because the secondhand aerosol (it isn't vapor) from e cigs isn't safe for them Kentucky Health News ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, HEALTH Does vaping cause secondhand smoke? Doctors explain the side effects: Details below.