Study of an Live-Attenuated Respiratory Syncytial Virus Vaccine in Infants and Toddlers
Public ClinicalTrials.gov record NCT04491877. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Safety, Immunogenicity, Infectivity, and Dose-Finding Study of an Investigational Live-Attenuated Respiratory Syncytial Virus (RSV) Vaccine in Infants and Toddlers
Study identification
- NCT ID
- NCT04491877
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 1, Phase 2
- Lead sponsor
- Sanofi Pasteur, a Sanofi Company
- Industry
- Enrollment
- 259 participants
Conditions and interventions
Conditions
Interventions
- RSV vaccine formulation 1 Biological
- RSV vaccine formulation 2 Biological
- Placebo Biological
Biological
Eligibility (public fields only)
- Age range
- 6 Months to 18 Months
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Sep 16, 2020
- Primary completion
- Apr 12, 2023
- Completion
- Apr 12, 2023
- Last update posted
- Sep 8, 2025
2020 – 2023
United States locations
- U.S. sites
- 25
- U.S. states
- 15
- U.S. cities
- 24
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Matrix Clinical Research-Site Number:8400012 | Gardena | California | 90247 | — |
| Paradigm Clinical Research-Site Number:8400026 | La Mesa | California | 91942 | — |
| Matrix Clinical Research-Site Number:8400032 | Los Angeles | California | 90057 | — |
| California Research Foundation-Site Number:8400016 | San Diego | California | 92123-1881 | — |
| Elite Clinical Trials, Inc.-Site Number:8400001 | Blackfoot | Idaho | 83221 | — |
| Leavitt Clinical Research-Site Number:8400036 | Idaho Falls | Idaho | 83404 | — |
| Snake River Research-Site Number:8400022 | Idaho Falls | Idaho | 83404 | — |
| The South Bend Clinic Center for Research-Site Number:8400024 | South Bend | Indiana | 46617 | — |
| Alliance for Multispeciality Research-Site Number:8400014 | El Dorado | Kansas | 67042 | — |
| AMR - Newton-Site Number:8400002 | Newton | Kansas | 67114 | — |
| Michael W. Simon, MD, PSC-Site Number:8400013 | Lexington | Kentucky | 40517 | — |
| Benchmark Research-Site Number:8400006 | Covington | Louisiana | 70433 | — |
| Nola Research Works-Site Number:8400017 | New Orleans | Louisiana | 70125 | — |
| Clinical Research Institute-Site Number:8400053 | Minneapolis | Minnesota | 55402 | — |
| Boeson Research-Site Number:8400011 | Missoula | Montana | 59804 | — |
| Be Well Clinical Studies-Site Number:8400054 | Lincoln | Nebraska | 68516 | — |
| Meridian Clinical Research - Norfolk-Site Number:8400005 | Norfolk | Nebraska | 68701 | — |
| MedPharmics Inc-Site Number:8400040 | Albuquerque | New Mexico | 87102 | — |
| East Carolina University/Brody Medical Sciences Building-Site Number:8400043 | Greenville | North Carolina | 27834 | — |
| Coastal Pediatric Research-Site Number:8400031 | Charleston | South Carolina | 29414 | — |
| Tribe Clinical Research-Site Number:8400027 | Greenville | South Carolina | 29607 | — |
| FMC Science-Site Number:8400042 | Lampasas | Texas | 76550-1820 | — |
| JBR Clinical Research-Site Number:8400041 | Salt Lake City | Utah | 84107 | — |
| Pediatric Associates of Charlottesville North-Site Number:8400007 | Charlottesville | Virginia | 22911 | — |
| National Clinical Research Inc-Site Number:8400004 | Richmond | Virginia | 23294 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 4 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04491877, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Sep 8, 2025 · Synced Jul 22, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04491877 live on ClinicalTrials.gov.