Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Respiratory Infections: early-phase trial registry
1 of 3 indexed Respiratory Infections 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
Respiratory Infections: 3 US clinical trials tracked, 1 recruiting.
Respiratory Infections 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 1 in Phase 1-2 (earlier-stage). The most active sponsor is Gary M Brittenham, MD, running 1 of these trials.
Enrollment posture brief
Registry condition respiratory-infections
OPEN 1 | RECR 33% | LATE 0 | EARLY 1 | RANK #5209 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Adherence, Treatment (33% recruiting · 6 trials)
Respiratory Infections 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 Respiratory Infections 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 Infections 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
Estimating Risk of Respiratory Infections Attributable to CFTR Heterozygosity
Philip Polgreen
NCT05474430
A Randomized Controlled Trial of a School Disinfection and Hand Hygiene Program
Boston Children's Hospital
NCT00514670
Vitamin D for Sickle-cell Respiratory Complications
Gary M Brittenham, MD
NCT01443728
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 2 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Respiratory Infections records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Respiratory Infections 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 Infections page
3 registered trials, 1 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 1 Respiratory Infections trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Gary M Brittenham, MD sponsors the most Respiratory Infections trials on record, review their full trial history before evaluating a specific study. See Gary M Brittenham, MD'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 Infections condition card totals 3 registered trials; most-linked intervention Active Comparator: Vitamin D3 12,000 IU; top US site state New York. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.