Clinical Trial Update: GARDASIL 9: 3 Dose vs. 2 Dose With Delayed 3rd Dose [Phase 4]

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Summary

Phase 4 study comparing a 3-dose Gardasil 9 schedule to a 2-dose schedule with a delayed third dose; results have been posted.

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Diseases / indications

• Anal Cancer
• Cervical Cancer
• Cervical Intraepithelial Neoplasia
• Genital Warts
• Oropharyngeal Cancer
• Penile Cancer
• Vaginal Cancer
• Vulvar Cancer

Drugs mentioned

• Gardasil 9 (Human papillomavirus vaccine, 9-valent)

Snippet

Sponsor: The University of Texas Medical Branch, Galveston | Conditions: Immunization, Efficacy | Phase 4 | Status: COMPLETED | Results posted: 2026-02-17