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Introducing the human papillomavirus (HPV) vaccine at ages 9 to 10 years rather than 11 to 12 years leads to a meaningful difference in initiation and completion of the vaccine series, including initiation and completion by age 13 years, according to a study presented at the annual meeting of the Infectious Diseases Society of America (IDWeek), held from Oct. 21 to 24 in Washington, D.C.
Sean O'Leary, M.D., M.P.H., from the University of Colorado Denver Anschutz Medical Campus and Children's Hospital Colorado in Aurora, and colleagues examined the impact of switching HPV vaccine initiation from 11 to 12 years to 9 to 10 years in a cluster-randomized trial among 31 pediatric practices in Colorado and California from 2021 to 2026. Sixteen practices were randomly assigned to introduce the vaccine at ages 9 to 10 years and 15 practices at ages 11 to 12 years.
The researchers found that the median age at initiation and completion of the series was 11.0 and 12.2 years and 11.8 and 13.3 years in the 9- to 10-year-old arm and 11- to 12-year-old arm, respectively.
85, respectively, for 9 to 10 years versus 11 to 12 years).
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