Disparities in parental human papillomavirus (HPV) vaccine awareness and uptake among adolescents.

•We assessed parental HPV vaccine awareness and uptake among girls in 2007 and 2011.•About 3 in 4 parents remained aware of the HPV vaccine, and vaccine uptake doubled.•In 2011, being male, Asian, less educated, and having a son predicted unawareness.•Uptake among daughters with poor access to care and insurance markedly increased.•Interventions to increase uptake among younger adolescents merit implementation.