Clinical Research Directory

Inclusion Criteria: * 18 years old or older and 70 years old or younger * Able to provide informed consent * Denies history of prior HPV vaccination with Gardasil9 (receipt of HPV vaccination other than Gardasil9 such as the bivalent or the quadrivalent HPV vaccine will be allowed) or unsure of vaccination status and born before 2003 * Born Male For Test group: HIV-positive people born male with current or past exposure to androgen blockers or estrogen (BM-EABE) * Living with HIV * Current or past exposure to androgen blockers or estradiol For Control group: HIV-negative Control * HIV negative * Either: Current or past exposure to androgen blockers or estradiol; no current or past exposure to androgen blockers or estradiol AND had sex with a person with a penis in the last year Exclusion Criteria: * Younger than 18 years old or older than 70 years old. * Self-reported or documented history of nine-valent HPV vaccine or unsure of vaccination status and born after 2003. * Born female * History of hypersensitivity, including severe reactions to yeast or other component of the vaccine. * Any condition requiring systemic chemotherapy or immunomodulant affecting antibody responses (i.e., rituximab, ibrutinib etc.), intravenous or subcutaneous immunoglobulin supplementation, radiation therapy, or immunomodulatory treatment within the previous 6 months (presence of precancerous lesions is not exclusionary).