A Study of Reduced Dosing of the Nonavalent HPV Vaccine in Women Living With HIV
Recruiting now Phase 4 NCT05495906
Run by University of British Columbia · for 18 to 45 · Women · accepts healthy volunteers
What this study is about
There are very little data on human papillomavirus (HPV) vaccination among the 18 million women living with HIV (WLWH) globally, who constitute a population most vulnerable to HPV and the resultant cervical cancer. Particularly, there are no data to date on reduced-dose schedules of nonavalent HPV (9vHPV) vaccination in WLWH and there are very little data on the 9vHPV vaccine in this population overall. It is critical to examine the 9vHPV vaccine in WLWH now because the quadrivalent HPV (4vHPV) vaccine has been discontinued. Additionally, in order to reach the World Health Organization's global goal of cervical cancer elimination, we must determine the role of various HPV prevention strategies in this important population including reduced vaccine dosing which can drastically increase the feasibility of HPV vaccination programs globally. This randomized clinical trial will enrol WLWH aged 18-45 from across Canada who have not previously received an HPV vaccine. Participants will be randomized 1:1 to receive 3 doses of 9vHPV vaccine at the routine vaccine schedule of 0/2/6 months or 2 doses at an expanded schedule of 0/6 months with a third dose at month 12 to adhere to current recommendations for WLWH. We will compare the immune response generated to two versus three doses of 9vHPV vaccine and will follow participants for 2 years to examine the immune response over time. This study, which builds upon our team's prior work on HPV vaccination in WLWH, will determine whether two doses of 9vHPV vaccine can be used in WLWH instead of three, and will examine additional aspects of HPV vaccination in WLWH including the immune response to three doses, vaccine safety and efficacy, and attitudes towards self-collected HPV samples in this population. These data will inform global public health policy and programming and will inform the global strategy for cervical cancer elimination.
Who can join (things the study team will check)
✅ You may be able to join if…
- Living with HIV
- Has a uterine cervix
🚫 You may not be able to join if…
- Unable to give fully informed consent
- Pregnant or unwilling to avoid pregnancy during vaccination
- Allergy to the vaccine or its components
- Prior receipt of any HPV vaccine
Where this trial is running
- Positive Health Services - Fraser Health, Surrey, British Columbia, Canada
- University of British Columbia, Vancouver, British Columbia, Canada
- Health Sciences Centre, Winnipeg, Manitoba, Canada
- Hamilton Health Sciences, Hamilton, Ontario, Canada
- St. Michael's Hospital, Toronto, Ontario, Canada
- Toronto General Hospital, Toronto, Ontario, Canada
- Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
- McGill University Health Centre, Montreal, Quebec, Canada
- Centre Hospitalier de l'Université Laval, Québec, Quebec, Canada
- Regina General Hospital, Regina, Saskatchewan, Canada
Who to contact
Deborah Money, MD · 6048752194 · deborah.money@ubc.ca
It's completely normal to call and ask questions before deciding anything. Mention the study ID: NCT05495906.
Verify everything on the official ClinicalTrials.gov record. Page updated July 2026.