JAMA Publishes Study on Secondhand Cannabis Smoke | mg …

The Journal of the American Medical Association, or JAMA, this week published a study comparing data on tobacco smoke with the potential effects of secondhand smoke from cannabis. Titled, “Marijuana, Secondhand Smoke, and Social Acceptability,” the study cited an event, held on 4/20 Day in San Francisco’s Golden Gate Park.

It described 15,000 event attendees, who reportedly smoked marijuana to the extent that a smoky cloud was visible half a mile away, at the University of California, San Francisco. Study authors argued if a similar event had been held for cigarette smokers, outcry and public health laws would have stopped it from taking place. However, unlike cigarettes, those exposed to secondhand cannabis smoke often feel that inhalation is harmless or even good for them.

“The evidence that secondhand exposure to marijuana smoke, like the evidence for all health effects of marijuana, is more limited than for tobacco,” the study

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