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Respiratory Syncytial Virus (RSV): early-phase trial registry
2 of 12 indexed Respiratory Syncytial Virus (RSV) trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #1,429 of 28,707 conditions by registered trial count.
12 US clinical trials · 2 currently recruiting · #1,429 of 28,707 conditions by registered trial count
Respiratory Syncytial Virus (RSV): 12 US clinical trials tracked, 2 recruiting.
Respiratory Syncytial Virus (RSV) is the subject of 12 registered US clinical trials on ClinicalTrials.gov, 2 of them currently open to new participants. 2 are in Phase 3-4 (later-stage) and 5 in Phase 1-2 (earlier-stage). The most active sponsor is Pfizer, running 2 of these trials.
Enrollment posture brief
Registry condition respiratory-syncytial-virus-rsv
OPEN 2 | RECR 17% | LATE 2 | EARLY 5 | RANK #1429 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Acute Renal Failure (17% recruiting · 6 trials)
Respiratory Syncytial Virus (RSV) lists 2 open slots (17% of 12 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Respiratory Syncytial Virus (RSV) on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Respiratory Syncytial Virus (RSV) is recruiting below its size-band peers.
2 of 12 indexed trials (16.7%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Respiratory Syncytial Virus (RSV) research.
Pfizer accounts for 2 of 12 trials (16.7%). 11 distinct sponsors appear on at least one study for this condition label.
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Typical Respiratory Syncytial Virus (RSV) enrolment sits around 363 participants.
Median target enrolment is 363 among the 12 trials that report a genuine target (sentinel values excluded). 3 of those (25%) plan for fewer than 100 participants.
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Respiratory Syncytial Virus (RSV) splits between interventional and observational designs.
7 interventional and 5 observational studies make up this index (58.3% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
12 total, page 1 of 1
RSV Vaccine Pregnancy Registry
CorEvitas
NCT06521944
Immunogenicity of RSVPreF3 Vaccine in Immunocompromised Persons
Johns Hopkins University
NCT07050732
Evaluating ABRYSVO Maternal Vaccine Effectiveness Among Infants
Pfizer
NCT07249320
Transplacental Transmission of RSV (TTRSV)
Tulane University
NCT05443607
A Phase 1 Study to Evaluate JCXH-108, an mRNA-based Vaccine Against RSV
Immorna Biotherapeutics
NCT06564194
Systems Biological Analysis of Immune Responses to RSV Vaccine
Emory University
NCT07185399
Wearable Assisted Viral Evidence (WAVE) Study A Decentralized, Prospective Study Exploring the Relationship Between Passively-collected Data From Wearable Activity Devices and Respiratory Viral Infections
Evidation Health
NCT06207929
A Study to Evaluate the Efficacy of an RSV F Vaccine in Older Adults
Novavax
NCT02608502
Detection of Influenza A, Influenza B, and RSV Using the Liat™ Assays on the Liat™ Analyzer
IQuum
NCT02067286
A Study to Evaluate the Safety and Immunogenicity of MEDI7510 in Older Adults
MedImmune
NCT02289820
A Study to Learn About the Safety and Immune Activity of RSVpreF in Children 2 to <18 Years of Age
Pfizer
NCT05900154
A Study to Evaluate EDP 938 Regimens in Children With RSV
Enanta Pharmaceuticals
NCT04816721
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 3 |
| Phase 2 | 2 |
| Phase 3 | 1 |
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Respiratory Syncytial Virus (RSV) records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Respiratory Syncytial Virus (RSV) trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Respiratory Syncytial Virus (RSV) page
12 registered trials, 2 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 2 Respiratory Syncytial Virus (RSV) trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Pfizer sponsors the most Respiratory Syncytial Virus (RSV) trials on record, review their full trial history before evaluating a specific study. See Pfizer's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Respiratory Syncytial Virus (RSV) condition card totals 12 registered trials; most-linked intervention Placebo; top US site state Louisiana. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.