| Not Yet Recruiting | Clinical Assessment of Respiratory Events for Kids: Integrating Diagnostics and Stewardship NCT07453914 | BioMérieux | N/A |
| Recruiting | ORCHARDS-AIR Study NCT07298967 | University of Wisconsin, Madison | N/A |
| Recruiting | The Fever Clinic Acute Respiratory Cohort NCT07278700 | Fudan University | — |
| Recruiting | Effectiveness and Implementation of a National Guideline for Acute Respiratory Tract Infections to Reduce Anti NCT07396428 | Center for Primary Care and Public Health (Unisante), University of Lausanne, Switzerland | N/A |
| Completed | Melatonin, Vitamins and Minerals Supplements for the Treatment of Covid-19 and Covid-like Illness NCT05670444 | Hôpital Universitaire Sahloul | Phase 1 |
| Unknown | InfluenCEF Study: Study on the Headache Associated With Influenza Infection NCT05704335 | Hospital Clínico Universitario de Valladolid | — |
| Unknown | A Trial of Two Mask Systems in Preventing SARS CoV-2 in Healthcare Workers (HCW) NCT05036941 | Ascend Performance Materials | N/A |
| Completed | Preventing Respiratory Viral Illness Invisibly NCT05084898 | Kenneth Rockwood | N/A |
| Unknown | Baloxavir Versus Oseltamivir for Nursing Home Influenza Outbreaks NCT05012189 | Insight Therapeutics, LLC | Phase 4 |
| Unknown | Epidemiological Investigation of COVID-19 in Laos Using a One-Health Approach in Human and Animals NCT04716543 | ANRS, Emerging Infectious Diseases | — |
| Unknown | Validation of a CDSA Strategy to Reduce Antibiotic Prescription in Senegal NCT05050825 | Foundation for Innovative New Diagnostics, Switzerland | N/A |
| Completed | Efficacy and Safety of Norketotifen in Uncomplicated Influenza-like Illness NCT04610047 | Emergo Therapeutics, Inc. | Phase 2 |
| Completed | Broadening Our Understanding of Early Versus Late Influenza Vaccine Effectiveness NCT04570904 | University of Leicester | — |
| Completed | COVID-19 Pandemic Response Network NCT04320862 | Duke University | — |
| Completed | Home Testing of Respiratory Illness NCT04245800 | Evidation Health | — |
| Completed | Norketotifen for the Treatment of Uncomplicated Influenza-like Illness NCT04043923 | Emergo Therapeutics, Inc. | Phase 2 |
| Unknown | Recombinant Influenza Vaccination in U.S. Nursing Homes NCT03965195 | Insight Therapeutics, LLC | Phase 4 |
| Completed | Biobran/MGN-3 Increases Innate Resistance and Reduces the Incidence of Influenza-like Illnesses NCT04646980 | Zagazig University | N/A |
| Active Not Recruiting | A Pragmatic Assessment of Influenza Vaccine Effectiveness in the DoD NCT03734237 | Henry M. Jackson Foundation for the Advancement of Military Medicine | Phase 4 |
| Completed | Non-specific Effects of Rabies Vaccine NCT03656198 | Ross University School of Veterinary Medicine | Phase 4 |
| Completed | Adjuvanted Influenza Vaccination Year 2 Follow-On Survey NCT03599739 | Insight Therapeutics, LLC | — |
| Completed | Kent State University / Price Chopper Employee Wellness Study NCT03454009 | Kent State University | N/A |
| Completed | FluSAFE: Flu SMS Alerts to Freeze Exposure NCT03274310 | Columbia University | N/A |
| Completed | Impact of Rapid Flu Testing in BMC ED NCT02979730 | Boston Medical Center | N/A |
| Completed | Adjuvanted Influenza Vaccination in U.S. Nursing Homes NCT02882100 | Insight Therapeutics, LLC | Phase 4 |
| Completed | Probiotic and Influenza Vaccination to Reducing Influenza-like Illness Incident in Elderly NCT03695432 | Indonesia University | Phase 4 |
| Completed | Evaluation of Psychometric Testing Properties of Severity Symptom Grading Scale of Influenza Infection: Flu-PR NCT02302924 | Henry M. Jackson Foundation for the Advancement of Military Medicine | — |
| Completed | How Does the Clinical Tool 'What's Going Around' Affect Clinical Practice NCT01979588 | Endeavor Health | N/A |
| Unknown | Nasal Specimen Collection Study in Patients With ILI and/or ARI in an Outpatient Setting NCT01687816 | Lieselot Houspie | — |
| Completed | Seasonal Influenza Vaccine Effectiveness Study in Kenya NCT01432340 | Gideon Emukule | — |
| Completed | Characterization of Influenza-like Illness in Mexico NCT01418287 | Mexican Emerging Infectious Diseases Clinical Research Network | — |
| Completed | Direct and Indirect Benefits of Influenza Vaccination in Schools and Households NCT00981513 | The University of Hong Kong | Phase 4 |
| Completed | REDucing Influenza Among University Students, University of California at Berkeley NCT00448773 | Centers for Disease Control and Prevention | Phase 4 |