Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Influenza: early-phase trial registry
27 of 157 indexed Influenza trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #70 of 28,707 conditions by registered trial count.
157 US clinical trials · 27 currently recruiting · #70 of 28,707 conditions by registered trial count
Influenza: 157 US clinical trials tracked, 27 recruiting.
Influenza is the subject of 157 registered US clinical trials on ClinicalTrials.gov, 27 of them currently open to new participants. 42 are in Phase 3-4 (later-stage) and 73 in Phase 1-2 (earlier-stage). The most active sponsor is National Institute of Allergy and Infectious Diseases (NIAID), running 36 of these trials.
Enrollment posture brief
Registry condition influenza
OPEN 27 | RECR 17% | LATE 42 | EARLY 73 | RANK #70 | SPON 36
Volume-matched condition peers
Nearest open-share peer: Arthritis, Rheumatoid (17% recruiting · 29 trials)
Influenza lists 27 open slots (17% of 157 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 Influenza 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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Influenza is recruiting below its size-band peers.
27 of 157 indexed trials (17.2%) are open to enrollment, against a 37.1% average across 139 conditions with 100+ trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Influenza research.
National Institute of Allergy and Infectious Diseases (NIAID) accounts for 36 of 157 trials (22.9%). 62 distinct sponsors appear on at least one study for this condition label.
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Typical Influenza enrolment sits around 219 participants.
Median target enrolment is 219 among the 157 trials that report a genuine target (sentinel values excluded). 55 of those (35%) plan for fewer than 100 participants.
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Influenza research is mostly interventional.
134 interventional and 23 observational studies make up this index (85.4% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
157 total, page 4 of 4
A Pharmacokinetic/Pharmacodynamic Study of Oseltamivir in Immunocompromised Children With Confirmed Influenza Infection
Hoffmann-La Roche
NCT01715909
Immune Response Following Seasonal Influenza Vaccination
Altimmune
NCT03163342
Bacterial Composition and Immune Responses in the Nose and Oropharynx During Influenza Infection
University of California, Los Angeles
NCT02597647
Kinetics of the Immune Response to Inactivated Influenza Vaccine in Healthy Adults
Vanderbilt University Medical Center
NCT03743688
A Study of Intravenous Tamiflu (Oseltamivir) in Children With Influenza
Hoffmann-La Roche
NCT01033734
TCAD vs. Monotherapy for Influenza A in Immunocompromised Patients
Fred Hutchinson Cancer Center
NCT00867139
Oral Triple Combination Antiviral Drug Therapy for Treatment of Influenza A in Immunocompromised Subjects
Adamas Pharmaceuticals
NCT00979251
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 42 |
| Phase 2 | 31 |
| Phase 3 | 17 |
| Phase 4 | 25 |
Top Sponsors
Named interventions
Most-linked intervention names on Influenza records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Influenza 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 Influenza page
157 registered trials, 27 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 27 Influenza trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- National Institute of Allergy and Infectious Diseases (NIAID) sponsors the most Influenza trials on record, review their full trial history before evaluating a specific study. See National Institute of Allergy and Infectious Diseases (NIAID)'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 Influenza condition card totals 157 registered trials; most-linked intervention Placebo; top US site state California. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.