A Study of Reduced Dosing of the Nonavalent HPV Vaccine in Women Living With HIV — StellaPhase 4 — Post-approval study. The treatment has been approved, but researchers continue monitoring it in a large population over time.
Trial locations(10 sites)
Canada
Positive Health Services - Fraser Health, Surrey, British Columbia University of British Columbia, Vancouver, British Columbia Health Sciences Centre, Winnipeg, Manitoba Hamilton Health Sciences, Hamilton, Ontario St. Michael's Hospital, Toronto, Ontario Toronto General Hospital, Toronto, Ontario Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec McGill University Health Centre, Montreal, Quebec Centre Hospitalier de l'Université Laval, Québec, Quebec Regina General Hospital, Regina, Saskatchewan Last updated February 2026