The lead time from infection to cancer is very long, we would not expect to see too much of a drop *yet*. But testing for those strains seems to be as useful for screening as a pap smear.
> No cases of invasive cancer were recorded in women immunized at 12 or 13 years of age irrespective of the number of doses.
> Women vaccinated at 14 to 22 years of age and given 3 doses of the bivalent vaccine showed a significant reduction in incidence compared with all unvaccinated women
For the second group, cases dropped from 8.4 to 3.2 per 100k.
