[volkl48]

Noted in my other comment, but mentioned here as well:

- Exposure to a strain is not the same as exposure to all strains. Few are likely to have been infected with all of the strains that the vaccine protects against, and infection by multiple strains is not a rare event.

- There's research being done on if the vaccine can reduce symptoms to people who already have HPV. Early results seem promising. Certainly nothing large enough for the CDC to be making recommendations on yet (that I know of/could find from a quick search), but worth noting - there may well turn out to be a significant benefit to the vaccine even after exposure, we just seem to be relatively early in that research.

- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6541142/

- https://pubmed.ncbi.nlm.nih.gov/38068369/