HPV Vaccination Linked to Decreased Oral HPV Infections
New study results suggest that vaccination against the human papillomavirus (HPV) may sharply reduce oral HPV infections that are a major risk factor for oropharyngeal cancer, a type of head and neck cancer.
The study of more than 2,600 young adults in the United States found that the prevalence of oral infection with four HPV types, including two high-risk, or cancer-causing, types, was 88% lower in those who reported receiving at least one dose of an HPV vaccine than in those who said they were not vaccinated.
About 70% of oropharyngeal cancers are caused by high-risk HPV infection, and the incidence of HPV-positive oropharyngeal cancer has been increasing in the United States in recent decades. In the United States, more than half of oropharyngeal cancers are linked to a single high-risk HPV type, HPV 16, which is one of the types covered by Food and Drug Administration (FDA)-approved HPV vaccines. …