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Human papillomavirus (HPV) prevalence in penile swab specimens from 18–26-year-old transgender women and men who have sex with men, overall and by self-reported HPV vaccination history (Seattle, Washington, 2016–2018). Error bars show 95% confidence intervals. Abbreviations: 4vHPV, quadrivalent HPV vaccine; 9vHPV, nonavalent HPV vaccine.
