They go for the simple paths through the FDA first. The HPV link to OC is new in comparison to the other known cancers and problems it causes, some which have been known for decades. It is on their radar, but getting new approvals through the FDA is a path navigated slowly. Having owned a class 3 FDA approved device manufacturing company, I can assure you that what is obvious isn't what they want, it is what you have documentation to prove. Clearly the vaccine prevents persistent HPV16 infections, and that has been PROVEN in cervical. While an undisputed biological obvious, they have to prove that it does the same thing in the oral environment even though the effects of the vaccine are known to be systemic.This is the FDA, and logic doesn't cover your ass if you are approving things. It only works on people that have not yet been exposed.

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.