Bogarting that joint might decrease oral hpv among cannabis users

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“The development of oral cancer is not a result of smoking cannabis per se; rather, it is hypothesized to be a result of contracting hpv through various forms of sharing and passing joints and other smoking apparatuses. Therefore, it is hypothesized that bogarting (and not passing) joints might decrease oral hpv among cannabis smokers.

It certainly may not be the cannabis smoke that causes oral cancers in heavy cannabis users. Most people who have ever smoked cannabis have most likely done so by sharing a rolled cigarette or pipe in a group setting. The sharing and passing of these smoking devices from an oral hpv-infected individual to an uninfected individual could easily provide a route of transmission for the virus between users. Frequency and setting should therefore be considered two major factors that might contribute to the likelihood of acquiring oral hpv.

Thus, the relationship between cannabis and various cancer types might not be from cannabis use itself, but rather from contracting high-risk types of oral hpv that lead to cancer in later life.”

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2794675/