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 Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy Tobacco Smoke, Vaping, and Asthma AAFA.org Is Secondhand Vaping Harmful To Your Health? Study finds secondhand smoke may be source of lead exposure in children, adolescents Vital Record Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London