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Respiratory Tract Infections clinical trials

The registry lists 753 studies for Respiratory Tract Infections across more than 10 countries. 114 are recruiting or about to start. 369 of them are mainly about Respiratory Tract Infections (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-12. Counting its 40 narrower conditions too, such as COVID-19: 17,629 studies, 1,863 open.

ClinicalTrials.gov finds 16,352 studies for Respiratory Tract Infections. How that becomes 751 here

This page counts the studies the registry files under Respiratory Tract Infections, and those it files under no condition that list Respiratory Tract Infectionsthemselves. Each study its search finds is placed by how the registry filed it and by the conditions it lists. ClinicalTrials.gov counts as of Nov 8, 2026. How condition pages count

  1. 16,352Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −14,044Filed under a narrower condition, counted on its own pageCOVID-19 7,501 · Influenza, Human 1,973 · Pneumonia 1,098 · Post-Acute COVID-19 Syndrome 394 · Pneumonia, Ventilator-Associated 340 · Tuberculosis, Pulmonary 300 · 30 more
  3. −178List Respiratory Tract Infections as a condition, but the registry did not file them under itMost often written as “Acute Respiratory Infection” (28), “Lower Respiratory Tract Infection” (17), and “COVID-19 Respiratory Infection” (16). The registry filed 106 of them under no condition at all, and the others under other conditions only, most often Respiratory Syncytial Virus Infections (9) and Diarrhea (8).
  4. −1,379Match it another way104 name it in the title, 21 in a keyword, and 1,254 by a synonym or other text the search reads.
  5. 751The count on this page

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Status

Completed
491
Recruiting
74
Status unknown
59
Terminated
45
Not yet recruiting
35
Active, not recruiting
21

Phase

Phase 3
104
Phase 2
97
Phase 1
64
Phase 4
63
Early Phase 1
5

Where

United States
210
Canada
50
France
49
United Kingdom
44
China
40
Germany
38

Who runs them

Pfizer (23) · GlaxoSmithKline (21) · Medicago (12) · National Institute of Allergy and Infectious Diseases (NIAID) (12) · University of California, Los Angeles (10) · Assistance Publique - Hôpitaux de Paris (7) · Insmed Incorporated (7) · University of Washington (6)

What is being tested here

Drugs under test in Respiratory Tract Infections studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Probiotic3114
Baloxavir333
BNT162 Vaccine225
Remdesivir222
Ibuzatrelvir222
Tocilizumab113
Aspirin123
Hydroxychloroquine122
Moxifloxacin122
Bacterial Lysates102

Drug classes tested here NSAIDs 1 open · Beta-lactamase inhibitors 5 · Local anesthetics 3 · Corticosteroids 3

Coming up

16phase 3 studies under way
52studies finish main data collection within a year7 of them phase 3

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

The 10 nearest, phase 3 first

Who these studies take

Of the 74 Respiratory Tract Infections studies recruiting now, 35 (47%) set no upper age limit and 31 (42%) stop at 75 or younger. 34 (46%) take children under 18. 3 (4%) are for women only and 0 (0%) for men only; 25 (34%) take healthy volunteers.

Recruiting studies that take each age, of 74
AgeWomenMen
1021 (28%)21 (28%)
1852 (70%)50 (68%)
3051 (69%)49 (66%)
4050 (68%)47 (64%)
5046 (62%)45 (61%)
6544 (59%)44 (59%)
7543 (58%)43 (58%)
8542 (57%)42 (57%)

Across all 753 studies, recruiting or not: 46% stop at 75 or younger and 43% at 65; 49% take children; 2% are for women only and 1% for men only; 40% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Respiratory Tract Infections studies take

Of 41 phase 3 interventional studies under Respiratory Tract Infections, half reached primary completion within 15 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 18 mo1–17 · 35 studies6 mo1–14 · 26 studies—
Phase 211 mo8–25 · 32 studies——
Phase 315 mo11–73 · 41 studies——
Phase 411 mo6–51 · 29 studies——
Interventional, no phase12 mo6–29 · 146 studies6 mo4–13 · 27 studies14 mo6–30 · 119 studies
Observational18 mo8–42 · 85 studies—25 mo12–48 · 66 studies

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

What changed recently

From the registry's own updates since Oct 15, 2026.

Started recruiting2

Newly registered8

Show 3 more

Studies

Recruiting first, then most recently updated. Showing 50 of 753. Browse all 753 → or search them.