V503-006 was a randomized safety and immunogenicity study in females 12–26 years of age.
V503-006 evaluated 9vHPV vaccine in those with previous qHPV vaccination.
9vHPV vaccine was generally well tolerated in prior qHPV vaccine recipients.
9vHPV vaccine was immunogenic for HPV 31/33/45/52/58 in prior qHPV vaccine recipients.