Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Lassa Fever: early-phase trial registry
1 of 3 indexed Lassa Fever trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #5,209 of 28,707 conditions by registered trial count.
3 US clinical trials · 1 currently recruiting · #5,209 of 28,707 conditions by registered trial count
Lassa Fever: 3 US clinical trials tracked, 1 recruiting.
Lassa Fever is the subject of 3 registered US clinical trials on ClinicalTrials.gov, 1 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 3 in Phase 1-2 (earlier-stage). The most active sponsor is Inovio Pharmaceuticals, running 1 of these trials.
Enrollment posture brief
Registry condition lassa-fever
OPEN 1 | RECR 33% | LATE 0 | EARLY 3 | RANK #5209 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Adherence, Treatment (33% recruiting · 6 trials)
Lassa Fever lists 1 open slots (33% of 3 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 Lassa Fever 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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Lassa Fever is recruiting below its size-band peers.
1 of 3 indexed trials (33.3%) 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.
Open and recent trials
3 total, page 1 of 1
ARN-75039 Lassa Fever Treatment in West Africa
Arisan Therapeutics
NCT07419373
DMID 23-0015; Lassa Fever CVD 1000
Wilbur Chen, MD, MS
NCT06546709
Safety, Tolerability and Immunogenicity of INO-4500 in Healthy Volunteers
Inovio Pharmaceuticals
NCT03805984
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
| Phase 2 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Lassa Fever records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Lassa Fever 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 Lassa Fever page
3 registered trials, 1 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 1 Lassa Fever trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Inovio Pharmaceuticals sponsors the most Lassa Fever trials on record, review their full trial history before evaluating a specific study. See Inovio Pharmaceuticals'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 Lassa Fever condition card totals 3 registered trials; most-linked intervention Cellectra® 2000; top US site state Missouri. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.