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Tundra lists 30 SARS-CoV-2 Infection clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.
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NCT07875270
Usability and Clinical Validation of the Flu A/B/COVID-19 + RSV Multiplex Rapid Test
This will be a prospective study for the clinical validation of the CorDx Tyfast Flu A/B/COVID-19 + RSV Multiplex Rapid Test for the qualitative detection and differentiation of SARS-CoV-2, Influenza A, Influenza B and RSV in AN samples. Results from the CorDx Tyfast Flu A/B/COVID-19 + RSV Multiplex Rapid Test will be compared to results from a 510(k) cleared highly sensitive, multi-analyte reverse transcriptase polymerase chain reaction (RT-PCR) test for SARS-CoV-2, Influenza A, Influenza B and RSV, such as the 510(k) cleared Cepheid Xpert Xpress CoV-2/Flu/RSV plus (K250995).
Gender: All
Ages: 6 Months - Any
Updated: 2026-10-15
1 state
NCT05897541
Phase 3 Study of S-217622 in Prevention of Symptomatic SARS-CoV-2 Infection
The purpose of this study is to measure the proportion of participants who are infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (positive reverse transcription polymerase chain reaction \[RT-PCR\] test) and have coronavirus disease 2019 (COVID-19) symptom(s) with S-217622 tablets compared with placebo tablets in participants who are household contacts of an individual with symptomatic COVID-19.
Gender: All
Updated: 2026-10-07
48 states
NCT07834073
Immunogenicity and Safety of a Single Dose of mRNA SARS-CoV-2 Vaccine in Chinese Adults With Hybrid Immunity
This is a multicentre post-marketing cohort study to evaluate the immunogenicity and safety of a single dose of mRNA SARS-CoV-2 vaccine SYS6006 in Chinese adults predominantly with hybrid immunity. A total of 2,052 adults aged 18 years and older who received one dose of SYS6006 were monitored for serious adverse events (SAEs) for 6 months. The first 60 participants comprised an immunogenicity subgroup, with blood samples collected before vaccination and at day 14, month 3, and month 6 post-vaccination to assess humoral and cellular immune responses.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-22
NCT05683353
Mechanism and Immune Function Analysis of SARS-CoV-2 Infection in Hematologic Tumors
The goal of this observational study is to compare the immune function and infection mechanism of patients with hematologic tumors and those people without underlying diseases after infection with SARS-CoV-2. Clinical characteristics, treatment options and responses will be collected. Peripheral blood will be collected from patients with hematologic tumors infected with SARS-CoV-2 and those people without underlying diseases infected with SARS-CoV-2.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-16
1 state
NCT05534048
Booster Study of PTX-COVID19-B in Adults Aged 18 Years and Older
The purpose of this clinical trial is to Evaluate the Safety and Immunogenicity of PTX-COVID19-B Administered as Booster Vaccination in Previously Vaccinated Adults Aged 18 Years and Older. This study is seeking participants who are: Adult males and females 18 years of age or older; In efficacy cohort : Subjects who were previously vaccinated with 2 doses of Comirnaty® administered at least 3 months prior to the booster dose.. All participants in this efficacy cohort will receive 1 of the 2 study vaccines: PTX-COVID19-B or Comirnaty®. All participants in efficacy cohort will receive a single 40 microgram dose PTX-COVID19-B of the study vaccine or one dose of Comirnaty® at the first study clinic and will return to the study clinic 6 more times. At each clinic visit, a blood sample will be taken. They study is about 6 months long for each participant. In safety cohort: Subjects who have previously received any primary series approved by WHO Emergency Use Authorization at least 3 months prior to enrollment or subjects who have already received one authorized booster vaccination and planned to receive PTX-COVID19-B as the 4th shot will be enrolled. All participants in this safety cohort will receive 1 dose vaccines: PTX-COVID19-B. All participants in safety cohort will receive a single 40 microgram dose of the study vaccine at the first study clinic and will return to the study clinic 5 more times. At each clinic visit, a blood sample will be taken. They study is about 6 months long for each participant.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-11
NCT06147063
A Randomized Trial Evaluating a mRNA-VLP Vaccine's Immunogenicity and Safety for COVID-19
The purpose of this study is to characterize the safety and immunogenicity of AZD9838 and AZD6563 when administered as a single dose vaccination against SARS-CoV-2 in adults.
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-31
4 states
NCT05305547
A Study to Compare S-217622 With Placebo in Non-Hospitalized Participants With COVID-19
The main aim of this study is to evaluate the efficacy of S-217622 versus placebo among outpatient adults with mild and moderate COVID-19 starting intervention within 3 days of symptom onset.
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-20
81 states
NCT06810934
A Phase 1/2A, Randomized Study of a T Follicular Helper (TFH)-Targeting Genetic Vaccine Strategy Designed to Induce Broad, Durable Immune Responses
The goal of this clinical trial is to test two investigational COVID-19 booster vaccines, called CoTend-s3BXBB and CoTend-BXBB, in healthy volunteers ages 40-64. The CoTend-s3BXBB vaccine includes a component called "s3", which was designed to improve the body's response to the vaccine. CoTend-BXBB is the same vaccine without s3. The main questions the study aims to answer are: 1) Is the investigational vaccine safe? 2) Does "s3" lead to bigger, broader, and longer-lasting responses to the vaccine? 5 different doses of the vaccines will be studied. Participants will receive a single dose of either CoTend-s3BXBB, CoTend-BXBB, or placebo. Participants will be monitored for side effects. Saliva, nasal, and blood samples will be collected and immune responses to the vaccine will be measured.
Gender: All
Ages: 40 Years - 64 Years
Updated: 2026-08-18
1 state
NCT05384561
Olfactory Training as a Treatment for Olfactory Dysfunction Post COVID-19
Olfactory dysfunction is a defining symptom of COVID-19 infection. Studies have demonstrated improved olfaction in patients with post infectious olfactory dysfunction after an olfactory training (OT). The aim of this study is to assess the clinical outcomes of olfactory training (12 weeks) therapy in the treatment of persistent olfactory dysfunctions after COVID-19. Specially, we aim to compare the effectiveness of two different olfactory training (different odors). A group will train themselves with 4 scents (rose, orange, clove and eucalyptus) and another group with 4 different scents (cheese, coffee, strawberries and lemon). Olfaction sensory evaluation will be performed by using different olfaction tests (Sniffin' Sticks and UPSIT) and complete questionnaires to assess olfactory perception and particularly parosmia and phantosmia.
Gender: All
Ages: 18 Years - Any
Updated: 2026-07-31
1 state
NCT04868903
Low vs. Moderate to High Dose Vitamin D for Prevention of COVID-19
The purpose of this study is to compare the risks of COVID-19 in individuals from Chicagoland communities randomized to low (400 IU/day) vs. moderate (4,000 IU/day) or high (10,000 IU/day) dose vitamin D.
Gender: All
Ages: 18 Years - Any
Updated: 2026-07-22
1 state
NCT07659847
Cardiovascular Assessment 5 Years After MIS-C
Multisystem inflammatory syndrome in children (MIS-C) is a severe complication associated with SARS-CoV-2 infection that frequently affects the cardiovascular system. Although acute cardiac abnormalities usually resolve, the long-term cardiovascular consequences of MIS-C remain uncertain. Previous follow-up of this cohort 2 years after MIS-C identified signs of subclinical cardiovascular abnormalities compared with healthy controls. This cross-sectional study aims to evaluate cardiovascular health in individuals 5 years after MIS-C. Participants with a history of MIS-C will be compared with age- and sex-matched healthy controls using cardiovascular imaging, vascular assessments, cardiopulmonary exercise testing, and biomarkers of endothelial injury.
Gender: All
Updated: 2026-06-22
1 state
NCT05855434
The ACDC Study Assessing Cognitive Deterioration in COVID-19
The long-term impact and effects of COVID-19 are still being determined. However, what is clear, is that some people are still struggling following a period of illness with COVID-19. Now known as 'long covid' or 'post covid-19 syndrome', people are not only experiencing physical symptoms like fatigue and breathlessness, but also psychological difficulties, as well as cognitive changes often referred to as 'brain fog'. This can include symptoms, such as changes in memory, difficulties with organisation and problem solving, as well as the ability to concentrate. Evidence from other research areas suggest that these changes could be due to shrinkage in areas of the brain that control functions like memory and concentration. There are also connections between different brain areas that work together to perform tasks such as remembering and concentrating, and these areas may also be affected by COVID-19. The purpose of this study is to scan the brains of patients reporting cognitive changes having been hospitalised with COVID-19 infection to see if any of these areas or connections have changed after infection and whether this might explain these cognitive changes.
Gender: All
Ages: 16 Years - Any
Updated: 2026-06-08
1 state
NCT07079670
Safety and Immunogenicity of NVX-CoV2705
This study is a Phase 3 trial designed to check the safety and immune response to a new Omicron JN.1 COVID-19 vaccine. Study researchers will give a single dose of this vaccine, called NVX-CoV2705, to approximately 120 participants. This includes adults aged 65 and older, and individuals aged 12 to 64 who have existing health conditions that put them at high risk for severe COVID-19. All participants must have received a previous COVID-19 vaccine at least 90 days before joining this study. Study researchers will be closely monitoring participants for their immune response for 28 days and collecting safety data for 180 days after vaccination.
Gender: All
Ages: 12 Years - 90 Years
Updated: 2026-06-05
9 states
NCT06099795
Evaluation of Concordance Between Exhaled Air Test (eBAM-CoV) and RT-PCR to Detect SARS-CoV-2
During the COVID-19 pandemic, testing primarily relied on the use of nasopharyngeal swabs to detect the SARS-CoV-2 virus, responsible for the disease. However, this technique has several limitations, including the variable quality of swabs, its invasive nature, and arbitrariness in the choice of the number of cycles. Furthermore, it does not allow for the detection of viral proteins. To overcome these limitations, researchers developed the eBAM-CoV test, patented for the detection of viral proteins in the exhaled air of COVID-19 patients. This portable device provides an immediate assessment of the "viral load" with both quantitative and qualitative results, showing promise for early virus detection. The researchers hypothesize that the eBAM-CoV test is likely to exhibit a satisfactory concordance with the reference RT-PCR test in the detection of COVID-19, especially among symptomatic patients or closed contacts.
Gender: All
Ages: 18 Years - Any
Updated: 2026-05-27
NCT06917261
Evaluation of the Diagnostic Performance of the TestNPass DM-DIV for SARS-CoV-2 Using a Nasopharyngeal Sample
The COVID-19 pandemic has created a major global health crisis that requires a rapid and effective response, particularly in the field of diagnostics. The first tests used, based on PCR (polymerase chain reaction) performed through a deep nasopharyngeal swab, have shown limitations in controlling the epidemic. The current need is to develop new tests that are rapid, affordable, and easy to use, and that can be implemented on a large scale in outpatient settings to reduce the burden on healthcare teams. In addition, a test that is easy to produce and can be stored at room temperature would help overcome the significant logistical challenge of regularly testing the general population to specifically isolate carriers of the virus. In this context, an innovative test called TestNPass has been developed. TestNPass is a rapid and affordable antigen test for screening and diagnosis that provides a secure digital passport and/or QR code upon request. The objective of this study is to evaluate the diagnostic performance of TestNPass using nasopharyngeal swabs for the detection of SARS-CoV-2 infection.
Gender: All
Ages: 18 Years - Any
Updated: 2026-05-12
NCT04516811
Therapeutic Use of Convalescent Plasma in the Treatment of Patients With Moderate to Severe COVID-19
A prospective, randomized, placebo-controlled, double-blinded, phase III clinical trial of the therapeutic use of convalescent plasma in the treatment of patients with moderate to severe COVID-19
Gender: All
Ages: 18 Years - Any
Updated: 2026-05-08
2 states
NCT05997290
A Study to Learn About New COVD-19 RNA Vaccine Candidates for New Variants in Healthy Individuals
The purpose of this clinical protocol is to learn about the safety, tolerability, and immunogenicity of new BNT162b2 RNA-based vaccine candidates targeting new variants of SARS-CoV-2 in healthy people. Substudy A: * This study will evaluate the safety, tolerability, and immunogenicity of BNT162b2 (Omi XBB.1.5) given as a single 30 µg dose, * in people who are 12 years of age and older, * who previously received at least 3 doses of a US-authorized mRNA COVID-19 vaccine, with the most recent dose being an Omicron BA.4/BA.5-adapted bivalent vaccine received at least 150 days before the study vaccination (Visit 1). * The study is about 6 months long for each participant. * Participants will have at least 5 visits to the clinic. * At each clinic visit a blood sample will be taken. * At least 1 nasal swab will taken. Substudy B: * This study will evaluate the safety, tolerability, and immunogenicity of BNT162b2 (Omi XBB.1.5) given as a single 30 µg dose, * in people who are 12 years of age and older, * who are COVID-19 vaccine-naïve * who have had any positive SARS-CoV-2 test result \>28 days before study vaccine administration. * The study is about 6 months long for each participant. * Participants will have at least 5 visits to the clinic. * At each clinic visit a blood sample will be taken. * At least 1 nasal swab will taken. Substudy C: * This study will evaluate the safety, tolerability, and immunogenicity of BNT162b2 (Omi JN.1) and BNT162b2 (Omi KP.2) given as a single 30 µg dose to: * Cohort 1: people who are 18 years of age and older, who will receive BNT162b2 (Omi JN.1), and, * Cohort 2: people who are 12 years of age and older, who will receive BNT162b2 (Omi JN.1), and, * Cohort 3: people who are 18 years of age and older who will receive BNT162b2 (Omi KP.2). * Participants may have never received a COVID-19 vaccine or, may have previously received COVID-19 vaccine(s), with the most recent dose received at least 150 days before the study vaccination (Visit 1). * The study is about 6 months long for each participant. * Participants will have at least 6 visits (Cohorts 1 and 3) or at least 5 visits (Cohort 2) to the clinic. * At each clinic visit a blood sample will be taken. * At least 1 nasal swab will taken.
Gender: All
Ages: 12 Years - Any
Updated: 2026-04-28
15 states
NCT06478420
COVID-19 Omicron BA.5 Subvariant Dose Finding Infection Study
A phase 1, dose-finding open label clinical infection, safety and viral detection optimization in healthy volunteers immunologically experienced against SARS-CoV-2.
Gender: All
Ages: 18 Years - 40 Years
Updated: 2026-04-24
1 state
NCT05168813
Efficacy Study of COVID-19 mRNA Vaccine in Regions With SARS-CoV-2 Variants of Concern
The study will evaluate the clinical efficacy of different dosing regimens of the Moderna COVID-19 mRNA vaccine (100 mcg) in preventing COVID-19 disease in people who are living with HIV or have comorbidities associated with elevated risk of severe COVID-19, with the different vaccine regimens assessed determined by whether the participant had evidence of prior SARS-CoV-2 infection at enrollment.
Gender: All
Ages: 18 Years - Any
Updated: 2026-04-21
8 states
NCT05463068
Study to Compare the Immunogenicity and Safety of 3 Lots of NVX-CoV2373 in Adults
This is a randomized, Phase 3 study comparing the immunogenicity and safety of 3 different lots of Novavax vaccine with Matrix-M™ adjuvant (NVX-CoV2373).The study will enroll approximately 900 previously vaccinated adults 18 to 49 years of age, inclusive.
Gender: All
Ages: 18 Years - 49 Years
Updated: 2026-04-17
16 states
NCT05141058
T Cell Therapy Opposing Novel COVID-19 Infection in Immunocompromised Patients
This is an open label, phase I dose-escalation study to evaluate the safety of coronavirus-specific T cell (CST) therapy for prevention of SARS-CoV-2 infection in immunocompromised patients following hematopoietic stem cell transplantation (HSCT). Participants will receive donor-derived CSTs for prevention of SARS-CoV-2 infection after HSCT (≥28 days and \<4 months after HSCT). In this dose escalation trial, three doses (1x107/m2, 2x107/m2, and 4x107/m2) will be tested for safety, with study arms for adult (≥18 years of age and \<80 years) HSCT recipients (Arm A) and two arms for pediatric (≥12 years of age and \<18 years; ≥2 years and \<12 years) HSCT recipients (Arm B and Arm C, respectively), and defined dose escalations in each study arm. The study agent will be assessed for safety (stopping rules defined) and antiviral activity.
Gender: All
Ages: 2 Years - 80 Years
Updated: 2026-03-12
2 states
NCT07430410
Clinical Validation of an At-Home Flu A/B and COVID-19 Rapid Test
The study's primary objective is to evaluate the performance of the CorDx Tyfast Flu A/B \& COVID-19 At-Home Test for detecting SARS-CoV-2, Influenza A, and B in nasal samples collected by lay users, compared to 510(k)-cleared RT-PCR tests. Secondary objectives are to assess usability and instruction comprehension and reproducibility with untrained operators at Clinical Laboratory Improvement Amendments (CLIA)-waived sites.
Gender: All
Ages: 2 Years - Any
Updated: 2026-02-25
NCT05172011
Understanding the Long-term Impact of COVID on Children and Families
This is a combined retrospective and prospective, longitudinal, observational meta-cohort of individuals age 0-25 years who will enter the cohort with and without SARS-CoV-2 infection at varying stages before and after infection. Individuals with and without SARS-CoV-2 infection and with or without PASC symptoms will be followed to identify risk factors and occurrence of PASC. This study will be conducted in the United States and participants will be recruited through inpatient, outpatient, and community-based settings. Study data including age, demographics, social determinants of health, medical history, vaccination history, details of acute SARS-CoV-2 infection, overall health and physical function, and PASC symptoms will be reported by participants or collected from the electronic health record using a case report form at specified intervals. Biologic specimens will be collected at specified intervals, with some tests performed in local clinical laboratories and others performed by centralized research centers or banked in the Biospecimen Repository. Advanced clinical examinations and radiologic examinations will be performed at local study sites with cross-site standardization.
Gender: All
Ages: Any - 25 Years
Updated: 2025-12-31
33 states
NCT05110911
Does Repeat Influenza Vaccination Constrain Influenza Immune Responses and Protection
The objectives of this study are to understand the long-term consequences of repeated annual influenza vaccination among healthcare workers (HCWs) and to use statistical and mathematical modelling to elucidate the immunological processes that underlie vaccination responses and their implications for vaccination effectiveness. These objectives will be achieved by pursuing three specific aims: 1. To study the immunogenicity and effectiveness of influenza vaccination by prior vaccination experience 2. To characterize immunological profiles associated with vaccination and infection 3. To evaluate the impact of immunity on vaccination effectiveness. Under Aim 1, a cohort of hospital workers will be recruited and followed for up to 4 years to assess their pre- and post-vaccination and post-season antibody responses, and their risk of influenza infection. These outcomes will be compared by vaccination experience, classified as frequently vaccinated (received ≥3 vaccines in the past 5 years), infrequently vaccinated (\<3 vaccinations in past 5 years), vaccinated once, vaccine naïve and unvaccinated. In Aim 2, intensive cellular and serological assessments will be conducted to dissect the influenza HA-reactive B cell and antibody response, and build antibody landscapes that typify the different vaccination groups. In Aim 3, the data generated in Aims 1 and 2 will be used to develop a mathematical model that considers prior infection, vaccination history, antibody kinetics, and antigenic distance to understand the effects of repeated vaccination on vaccine effectiveness. Completion of the proposed research will provide evidence to inform decisions about continued support for influenza vaccination programs among HCWs and general policies for annual influenza vaccination, as well as much needed clarity about the effects of repeated vaccination. In March-April 2020 pursuant to the SARS-CoV-2 global pandemic an administrative supplement added a SARS-CoV-2 protocol addendum for follow-up of COVID-19 infections amongst our HCW participant cohort. The following objectives were added: 1. To estimate risk factors and correlates of protection for SARS-CoV-2 infection amongst HCW 2. To characterize viral kinetics and within-host viral dynamics of SARS-CoV-2 infecting HCW 3. To characterize immunological profiles following infection by SARS-CoV-2 4. To characterize immunological profiles following vaccination for SARS-CoV-2.
Gender: All
Ages: 18 Years - 60 Years
Updated: 2025-04-01
5 states