Post-licensure safety surveillance of 9-valent human papillomavirus vaccine using the vaccine adverse event reporting system, 2014–2024

The safety profile of 9vHPV over its first decade of use remains consistent with pre-licensure data, with most AEs being nonserious and self-limiting. Disproportionality analysis identified potential safety signals warranting further investigation but did not confirm causality. Continuous surveillance is necessary to further evaluate these rare events and ensure the ongoing safety of 9vHPV.