Phase 1/2 Study of Chlamydia Trachomatis mRNA Vaccine in Adults Aged 18 to 29 Years
← catalyst calendarNCT06891417 · readout in 502 d
Sponsored by Sanofi (industry) · SNY — their whole pipeline →.
Phase
Phase 1/2
Status
Recruiting
Study type
Interventional
Design
Randomized · Triple · Prevention
Enrollment
1,560estimated
Sites
7
Country
Australia
Every value on this page is a field the sponsor filed with ClinicalTrials.gov, reproduced. Dates are their own estimates, revised as a study runs, unless the registry marks them actual. sources →
Source: ClinicalTrials.gov, retrieved 2026-08-19
Dates
each axis at the precision it was filed, with the registry's own basis| Date | Filed | Basis | What it is |
|---|---|---|---|
| Start | 2025-03-27 | actual | When the study began enrolling |
| Primary completion | 2028-01-03 | estimated | The date the last participant is measured for the primary outcome — the readout window |
| Study completion | 2028-01-03 | estimated | The whole study's end, after follow-up |
| First posted | 2025-03-24 | actual | When this record first appeared on the registry |
| Results posted | — | When the sponsor posted results to the registry | |
| Record updated | 2026-04-08 | actual | The sponsor's own last edit to this record — every projection above is as current as this date |
What it studies
Condition
- Chlamydia Trachomatis Immunization
Interventions
- Biological: Chlamydia mRNA Vaccine
- Other: Placebo
Primary outcomes
what the primary-completion date above is the date OFPresence of immediate unsolicited systemic adverse events (AEs)
measured Within 30 minutes after each vaccine injection
Presence of solicited injection site and systemic reactions
measured Up to 7 days after each vaccine injection
Presence of unsolicited AEs
measured Up to 28 days after each vaccine injection.
Presence of medically attended adverse events (MAAEs)
measured Up to 6 months after last vaccine injection
Presence of all serious AEs (SAEs) and all adverse events of special interest (AESIs)
measured Up to 12 months after last vaccine injections
Presence of related SAEs, and fatal SAEs
measured Throughout the study, appriximatley 18 months
Presence of out-of-range biological test results (Sentinel Cohort and Safety Subset of Main Cohort)
measured Up to 7 days after each vaccination injections
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