Human papillomavirus vaccination at age 9 or 10 years to increase coverage – a narrative review of the literature, United States 2014–2024

This is the authors' abstract. We don't add key points for this paper.

= 7). While retrospective analyses found earlier initiation associated with completion, limitations in methodology preclude a cause-and-effect interpretation. Impact of age 9 vaccination is difficult to isolate in intervention studies that had multiple components. While initiating vaccination at age 9 is feasible, questions remain regarding the benefit of this approach to increase coverage.