Interesting research published in the July JAMA Oncology and summarized in Augusts Hygiene Connection. The small sample research showed a strong connection between the presence of HPV16 DNA in post-treatment oral rinses samples and the reoccurrence of Human Papillomavirus-Related Oropharyngeal Carcinoma.
http://www.dimensionsofdentalhygiene.com/2015/08_August/Hygiene_Connection/Study_Finds_HPV16_Correlates_To_Oral_Cancer_Recurrence.aspx