16 is the bad guy in most oropharyngeal cancers. While some studies have found 18 in very small numbers, researchers with the highest experience think that this is an "artifact" more than a cause. This means that it was along for the ride but not the active agent, or even an anomaly in the testing process, as the numbers are so small. 18 is a big deal in cervical.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.