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. 2021 May 15;73(8):1388–1396. doi: 10.1093/cid/ciab434

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© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 2. — Geometric mean (95% confidence interval) titers to HPV 6 (A), 11 (B), 16 (C), and 18 (D) among naive and previously exposed 18–26-year-old men who have sex with men living with HIV, up to 2 years after initiation of vaccination. Titers in participants naive to a qHPV vaccine HPV type are shown in blue. Titers in participants previously exposed to that HPV type are shown in red. Abbreviations: GMT, geometric mean titer; HIV, human immunodeficiency virus; HPV, human papillomavirus; qHPV, quadrivalent human papillomavirus. Asterisks show when vaccine doses were administered.