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Ervebo

Phase 2

Ebola Virus Disease | Monoclonal antibody | Infectious Disease |Regeneron Pharmaceuticals, Inc.|Last Updated: Jan 22, 2026

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
RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment132
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05202288Impact of Delay Between Administration of Inmazeb Administration and Vaccination by Ervebo on Vaccine Immune Response on Healthy VolunteersPHASE2 NOT YET_RECRUITING 132Jan 1, 2027Aug 1, 2027Jan 22, 2026 -
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Study Endpoints
Primary Endpoints
Neutralizing antibodies rates
Day 1, Day 29, Day 57, Day 85 and during participant's early termination

The level will be evaluated with a pseudo-type plaque reduction neutralization test

Secondary Endpoints
Anti-EBOV GP IgG rates
Day 1, Day 29, Day 57, Day 85 and during participant's early termination
RT-PCR VSV
Day 3
T cell response
Day 1, Day 29
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
Ervebo 72 million PFUACTIVE_COMPARATORThe control arm (vaccination alone) will serve to characterize the immune response to the vaccine and it will be used as a comparator of vaccine immune response in the intervention arms. Administration at D1.
Inmazeb 150mg/kgACTIVE_COMPARATORThis second control arm of mAb alone will serve to characterize the pharmacokinetic profile of mAb in the Guinean population. Administration at D1.
Inmazeb 150mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 3, is a concomitant administration of the antibody and the vaccine at D1.
Inmazeb 50mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 4, is a concomitant injection of different-dose of the antibody and the vaccine. This design mimics a time interval of 15 days between Ervebo and Inmazeb administration. The administration will be at D1. These may help define a time interval between Ervebo administration and Inmazeb infusion.
Inmazeb 10mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 5, is a concomitant injection of different-dose of the antibody and the vaccine. This design mimics a time interval of 57 days between Ervebo and Inmazeb administration. The administration will be at D1. These may help define a time interval between Ervebo administration and Inmazeb infusion.
Inmazeb 0.7mg/kg + Ervebo 72 million PFUEXPERIMENTALThe Arm 6, is a concomitant injection of different-dose of the antibody and the vaccine. This design mimics a time interval of 169 days between Ervebo and Inmazeb administration. The administration will be at D1. These may help define a time interval between Ervebo administration and Inmazeb infusion.
Interventions
NameTypeDescription
ErveboBIOLOGICALAdministration of r-VSV-ZEBOV vaccine
InmazebDRUGAdministration of Inmazeb
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersYes

Inclusion Criteria: * Available for the duration of the protocol follow-up; * Consent to participate ; * Agreed not to participate in another clinical research study until the end of the trial follow-up. Exclusion Criteria: * Prior history of EVD (self-reported); * Previous vaccination with r-VSV...

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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT05202288studyFirstPostDate: changed