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ChAdOx1-HPV

Phase 1

HPV Infection | Monoclonal antibody | Infectious Disease |Barinthus Biotherapeutics plc|Last Updated: Aug 28, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment108
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04607850Prime-boost Vaccine Study in Women With Low-grade Cervical HPV LesionsPHASE1 COMPLETED 108Mar 16, 2021Jan 16, 2024Aug 28, 202516 Belgium, Estonia +1
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Study Endpoints
Primary Endpoints
Incidence of adverse events to measure safety and reactogenicity
3 months for the lead-in and 12 months for the main phase

Measure of adverse events, serious adverse events (SAEs), ≥Grade 3 study vaccine-related adverse events reported.

Secondary Endpoints
Determine the dose of ChAdOx1-HPV plus MVA-HPV vaccines for further development
3 months for lead in phase and 12 months for main phase
Determine the effect of ChAdOx1-HPV plus MVA-HPV vaccines on the clearance of high risk HPV infection
12 months for main phase only
Determine the effect of ChAdOx1-HPV plus MVA-HPV vaccines on cervical intraepithelial neoplasia (CIN)
12 months for main phase only
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Lead-in Group A ChAdOx1-HPV low dose and MVA-HPV low doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^8 vp) and MVA-HPV (1 x 10\^7 pfu)
Lead-in Group B ChAdOx1-HPV mid dose and MVA-HPV low doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^9 vp) and MVA-HPV (1 x 10\^7 pfu)
Lead-in Group C ChAdOx1-HPV high dose and MVA-HPV high doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^10) vp and MVA-HPV (1 x 10\^8 pfu)
Group 1 ChAdOx1-HPV mid dose and MVA-HPV low doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^9 vp) and MVA-HPV (1 x 10\^7 pfu)
Group 2 ChAdOx1-HPV high dose and MVA-HPV low doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^10 vp) and MVA-HPV (1 x 10\^7 pfu)
Group 3 ChAdOx1-HPV low dose and MVA-HPV high doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^8 vp) and MVA-HPV (1 x 10\^8 pfu)
Group 4 ChAdOx1-HPV mid dose and MVA-HPV high doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^9 vp) and MVA-HPV (1 x 10\^8 pfu)
Group 5 ChAdOx1-HPV high dose and MVA-HPV high doseEXPERIMENTALPrime-boost vaccine doses: ChAdOx1-HPV (2 x 10\^10 vp) and MVA-HPV (1 x 10\^8 pfu)
Group 6 Placebo SalinePLACEBO_COMPARATORSodium Chloride (0.9%)
Interventions
NameTypeDescription
ChAdOx1-HPVBIOLOGICALTrial vaccine
MVA-HPVBIOLOGICALTrial vaccine
PlaceboBIOLOGICALSaline placebo vaccine
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Eligibility Criteria
Age Range25 Years — 55 Years
SexFEMALE
Healthy VolunteersNo
Study Sites16

Inclusion Criteria: 1. Females aged ≥25 and ≤55 years of age at screening. 2. Persistent hrHPV infection defined as a documented cervical infection with hrHPV type(s) in the 6 to 18 months prior to screening and confirmed at screening (participants in the main and expansion phases only). Participan...

Countries:BelgiumEstoniaUnited Kingdom
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