Indoor Vape Vapor May Increase Lung Health Risks Technology Networks Study finds secondhand smoke may be source of lead exposure in children, adolescents Vital Record Despite widespread smoke free policies in California, rates of recent exposure to secondhand tobacco smoke, vape aerosol, and cannabis smoke among adults aged 1864 have been slowly increasing since 2020, with vape exposure Juul study shows secondhand vaping emissions are less toxic than cigarette smoke