HPV Subtype 18 A subtype of the human papillomavirus (HPV) which is less common in the airway than the more common subtypes 6 and 11. HPV 18 is associated with a higher risk of cancer formation, along with HPV subtypes 16, 31, 45, 55, and others. 🔊 Click for Audio Version Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on LinkedIn (Opens in new window)