Respiratory Tract Infections Clinical Trials

30 recruitingLast updated: June 18, 2026

There are 30 actively recruiting respiratory tract infections clinical trials across 21 countries. Studies span Not Applicable, Phase 4, Phase 3, Phase 1, Phase 2. Top locations include London, United Kingdom, Melbourne, Victoria, Australia, Cape Town, Western Cape, South Africa. Updated daily from ClinicalTrials.gov.


Respiratory Tract Infections Trials at a Glance

30 actively recruiting trials for respiratory tract infections are listed on ClinicalTrialsFinder across 6 cities in 21 countries. The largest study group is Not Applicable with 8 trials, with the heaviest enrollment activity in London, Melbourne, and Cape Town. Lead sponsors running respiratory tract infections studies include Professor Klaus Bønnelykke, Desmond Tutu TB Centre, and Charles University, Czech Republic.

Browse respiratory tract infections trials by phase

Treatments under study

About Respiratory Tract Infections Clinical Trials

Looking for clinical trials for Respiratory Tract Infections? There are currently 24 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Respiratory Tract Infections trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Respiratory Tract Infections clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 120 of 30 trials

Recruiting
Not Applicable

Optimal Implementation of Antimicrobial Stewardship in General Practice

Respiratory Tract Infections (RTI)The Use of Antimicrobial Stewardship in in General Practice (Family Medicine)
University of Wollongong120 enrolled4 locationsNCT06953804
Recruiting
Phase 1

A Study of How Ibuzatrelvir is Taken up Into the Blood of Healthy Adults After Taking Different Tablets of Ibuzatrelvir

Upper respiratory tract infectionsrespiratory tract infectionCOVID-19 (SARS-CoV-2) infection+8 more
Pfizer18 enrolled1 locationNCT07552779
Recruiting
Phase 2

Evaluation of the Clinical Efficacy of Antrrix Probiotics in Improving Recurrent Respiratory Infections in Infants and Young Children

Recurrent Respiratory Tract Infections
Min-Tze LIONG120 enrolled2 locationsNCT07297966
Recruiting
Not Applicable

Intravenous Versus Oral Treatment of the Main Acute Infections

CellulitisRespiratory Tract InfectionsUrinary Tract Infections
University of Southern Denmark4,000 enrolled7 locationsNCT06715306
Recruiting
Not Applicable

Comparison of Nasopharyngeal Swab v. Nasopharyngeal Saline Wash or Saliva Collection in Testing for Respiratory Viruses

Respiratory Tract Infections
University of Nebraska1,000 enrolled1 locationNCT05864118
Recruiting
Not Applicable

An Adjunct Test Distinguishing Bacterial From Viral Etiology Improves Resource Utilization and Efficiency in the ED.

Respiratory Tract Infections
The University of Texas Health Science Center, Houston100 enrolled1 locationNCT06070688
Recruiting

The Fever Clinic Acute Respiratory Cohort

Influenza Like-illnessCommunity-acquired PneumoniaFebrile Illnesses+2 more
Fudan University1,000 enrolled1 locationNCT07278700
Recruiting

Comparing and Predicting the Risk of Respiratory Tract Infection (RTI) Among Post-menopausal Women on or Without Hormone Replacement Therapy (HRT): an Observational Cohort Study

Menopausal WomenRespiratory Tract Infections (RTI)
Insel Gruppe AG, University Hospital Bern400 enrolled1 locationNCT07292857
Recruiting
Not Applicable

Outpatient Pediatric Pulse Oximeters in Africa

HypoxiaRespiratory Tract InfectionsChild+1 more
Johns Hopkins University1,200 enrolled1 locationNCT05914324
Recruiting

Respiratory Infections in Young Children

Viral infectionsCohort StudyRespiratory Tract Infections (RTI)+1 more
Eduardo Lopez -Medina1,088 enrolled2 locationsNCT07249996
Recruiting
Phase 1

Phase I Study of Single/Multiple Ascending Doses of JKN2501 for Injection in Chinese Healthy Volunteers

Bacterial InfectionsRespiratory Tract InfectionsUrinary Tract Infections+1 more
Joincare Pharmaceutical Group Industry Co., Ltd66 enrolled1 locationNCT07207291
Recruiting
Phase 3

VItamin D in pregnanCy for prevenTion Of eaRlY Childhood Asthma

AsthmaFractures, BoneAllergy+8 more
Professor Klaus Bønnelykke2,000 enrolled1 locationNCT06570889
Recruiting
Phase 3

Fish Oil in pREgnancY for Personalized Prevention of Early Childhood Asthma

AsthmaFractures, BoneAllergy+8 more
Professor Klaus Bønnelykke2,000 enrolled1 locationNCT06560255
Recruiting
Not Applicable

Perspectives on Antibiotics and Tracking Symptoms in Children

PharyngitisOtitis MediaCellulitis+4 more
Murdoch Childrens Research Institute300 enrolled1 locationNCT07093749
Recruiting

TINO: T Cells in the Nose of Older Adults

AgingRespiratory Tract Infections
Leiden University Medical Center170 enrolled1 locationNCT06039527
Recruiting
Phase 4

Antibiotic Therapy in Viral Airway Infections

Respiratory Tract InfectionsRespiratory Syncytial Virus (RSV)Influenza+1 more
University Hospital, Akershus380 enrolled12 locationsNCT05045612
Recruiting
Not Applicable

How OMT Benefits Newly Diagnosed Patients With Respiratory Illness When Given Alongside Other Standard Care.

SinusitisPneumoniaBronchitis+2 more
Geisinger Clinic68 enrolled1 locationNCT06495021
Recruiting

Predicting Ventilator-associated Lower Respiratory Tract Infection Outcomes Using Sequenced-based Early Microbiological Response

PrognosisRespiratory Tract InfectionsPneumonia, Ventilator-Associated
The First Affiliated Hospital with Nanjing Medical University200 enrolled1 locationNCT06467864
Recruiting

To Evaluate Mucosal and Systematic Immune Response to Acute Respiratory Tract Infections of South African Children

Mucosal ImmunityRespiratory Tract Infections (RTI)
Desmond Tutu TB Centre250 enrolled2 locationsNCT06902194
Recruiting
Phase 4

OM 85 to Prevent Respiratory Infections in Older At Risk Patients

Respiratory Tract Infections (RTI)
Campus Bio-Medico University360 enrolled1 locationNCT06655272