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A Randomized Clinical Trial Investigating the Safety, Reactogenicity, and Immunogenicity A

This is a randomized, double-blind, placebo-controlled study which aims to assess the safety, reactogenicity, and immunogenicity after one and two doses of BNT166a or placebo in healthy participants.

Condition(s)Mpox (Monkeypox), Smallpox, Orthopoxvirus Infection
StatusRecruiting
PhasePhase 2
Study typeInterventional
SummaryThis is a randomized, double-blind, placebo-controlled study which aims to assess the safety, reactogenicity, and immunogenicity after one and two doses of BNT166a or placebo in healthy participants.
Who can participateKey Inclusion Criteria (applicable to all participants unless otherwise specified): * Are male or female individuals ≥18 years of age at the time of giving informed consent: * Cohort 1: ≥18 to ≤45 years of age * Cohort 2: ≥18 to ≤64 years of age * Cohort 1: Participants must be Orthopoxvirus-naïve (have no history of smallpox or mpox vaccination or mpox infection). * Cohort 2: Participants must be Orthopoxvirus-experienced (have evidence of mpox or smallpox vaccination or mpox infection at least 2 years prior to consent). Key Exclusion Criteria (applicable to all participants unless otherwise specified): * Have had recent exposure to mpox (defined as close contact with a probable or confirmed case of mpox within the past 28 days, or have evidence of mpox infection or mpox vaccination withi
Ages18 Years to 64 Years
SexAll
Accepts healthy volunteersYes
Lead sponsorBioNTech SE
LocationsKinshasa, Democratic Republic of the Congo; Kinshasa, Democratic Republic of the Congo; Cape Town, South Africa; Cape Town, South Africa; Cape Town, South Africa; Johannesburg, South Africa
Start date2026-02-20
NCT IDNCT07379580
Official listinghttps://clinicaltrials.gov/study/NCT07379580

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