Can You Actually Get a Contact High? Green Goods Cannabis' vapes do you know what you're vaping? FRANK Vaping cannabis associated with cough, bronchitis and wheezing, study finds CNN The dirty, dangerous secret of California's legal weed Los Angeles Times Secondhand Marijuana Smoke and Indoor Air Quality US EPA Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect