A 16-year-old female comes to the clinic with her mother to establish care. Her mother reports that the family has moved several times during the past few years, and she presents records from several different health centers. These records indicate the daughter received three doses of the 9-valent human papillomavirus vaccine (9vHPV) vaccine series; she received an initial dose at age 16 years, followed by a second dose 1 month later, and a third dose 2 months after the second dose. It has now been 6 months since the first vaccine dose was given and 3 months since the last dose was administered.