“…According to National Immunization Survey-Teen (NIS-Teen), which measures the uptake of preteen vaccines, only 52.6 % of adolescents in California aged 13 to 17 years old as of 2018 have completed the HPV vaccine series. ( Centers for Disease Control, 2022 , Walker et al, 2019 ) Studies have found that socioeconomic status, rural residence, ethnicity/race and educational policy were often strong predictors of differences in vaccine uptake, ( Staples et al, 2021 , Rotsides et al, 2021 , Vickers et al, 2019 , Perkins et al, 2016 , Niccolai et al, 2011 ) making it essential to understand regional variation and associated correlates when assessing vaccination patterns in California.…”