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COVID-19

Tundra lists 249 COVID-19 clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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ACTIVE NOT RECRUITING

NCT05292274

NIH RECOVER Tissue Pathology: Understanding the Long-Term Impact of COVID-19

The Post-Acute Sequelae of SARS-CoV-2 (PASC) Autopsy Study is a cross-sectional study designed to define and characterize the epidemiology, natural history, clinical spectrum, and underlying mechanisms of post-acute effects of SARS-CoV-2 infection in a diverse population representative of the general COVID-19 population in the US. The autopsy study will characterize the pathology of PASC in (i) non-hospitalized patients who die 30 days or later from symptom onset of COVID-19, and (ii) hospitalized patients who die 30 days or later after discharge from a hospitalization for COVID-19. The study will include decedents who had previously fully recovered from SARS-CoV-2 infection (i.e., \>30 days from onset in non-hospitalized, or \>30 days from discharge in hospitalized patients), and decedents who meet clinical criteria of PASC as defined by the recent World Health Organization publication (see Section 5.4 below). The autopsy study will also explore the pathology of acute SARS-CoV-2 infection in a smaller subset of patients who died 15-30 days from symptom onset. This protocol defines the common set of clinical data elements, autopsy procedures for tissue collection, core measures, pathology protocols, shared pathology tissues, data elements, and methodology. Each investigator site is expected to perform autopsies on the decedents to address the pathophysiology of the potential long-term effects of SARS-CoV-2 infection on human health. The Consortium analysis plan aims to address research questions by incorporating: 1) tissue obtained from autopsies performed at each Phase II participant's site; and 2) tissue available from other pathology investigators/autopsy sites within the Consortium.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-29

1 state

COVID-19
SARS CoV 2 Infection
ACTIVE NOT RECRUITING

NCT07221162

A Safety and Immunogenicity Trial of Boost-2867 Vaccine, Via Intranasal and Intramuscular Routes

This phase 1 clinical trial will evaluate the safety, reactogenicity, and immunogenicity of Boost-2867, given intramuscular (IM) with or without adjuvant or intranasal (IN) without adjuvant, as a booster dose to previously vaccinated healthy adults. Each of the study sites will be assigned to enroll either only participants who will receive IM administration (up to 5 sites) or only participants who will receive IN administration (up to 5 sites); no site will administer both IM and IN study product administrations. Within the IM and IN Arms the cohorts will be sequentially enrolled. The study is designed as a non-randomized, open-label, dose-escalation clinical trial evaluating one dose level of Boost-2867 without adjuvant administered IM, three dose levels of Boost-2867 with adjuvant administered IM, and three dose levels of Boost-2867 without adjuvant administered IN. A sample size of 140 participants (20 participants per dose cohort) is anticipated. To evaluate for early safety signals for this first-in-human trial, study product administration of participants enrolled for IM administration and those enrolled for IN administration will proceed in a staged fashion. For Cohorts 1 (IM administration without adjuvant) and 5 (IN administration), which may be enrolled and dosed concurrently, 3 sentinel participants under 50 years of age will be enrolled in each Cohort over at least 2 days. For each of those Cohorts independently, a safety review of halting rules and clinical safety data through at least Day 8 will be conducted by the Protocol Safety Review Team (PSRT) prior to enrollment of the remainder of the cohort. Enrollment, dosing, and safety oversight for IM Cohorts 2, 3, and 4 will proceed in the same fashion as Cohort 1, except that sentinel enrollment need not be spaced over at least 2 days. Similarly, for IN Cohorts 6 and 7, enrollment and safety oversight will proceed in the same fashion as Cohort 5, except that sentinel enrollment need not be spaced over at least 2 days. The primary objectives are: 1) To evaluate the safety and reactogenicity of a single IM injection of three different antigen dose levels (5, 15, and 50 microgram) of Boost-2867 with Alhydrogel (R) (alum) and CpG 7909 adjuvants, and a single injection of 50 microgram Boost-2867 without adjuvant, in previously vaccinated healthy adults. 2) To evaluate the safety and reactogenicity of a single IN administration of three different antigen dose levels (20, 50, and 125 microgram) of Boost-2867 without adjuvant in previously vaccinated healthy adults.

Gender: All

Ages: 18 Years - 64 Years

Updated: 2026-05-29

8 states

COVID-19
ACTIVE NOT RECRUITING

NCT05822219

Vaccine Hesitancy in Black/African Americans With Rheumatic Diseases

To establish the efficacy of a community-based POL (Popular Opinion Leader) intervention with two different trainings designed to increase COVID-19 vaccine and booster uptake and reduce hesitancy among social networks of Black individuals with rheumatic conditions. The investigators will also determine the structure and composition of the personal and outreach social networks of POLs.

Gender: All

Ages: 18 Years - 85 Years

Updated: 2026-05-29

1 state

Rheumatic Diseases
COVID-19 Vaccine
COVID-19
+1
NOT YET RECRUITING

NCT07149428

Longitudinal Deep Phenotyping of Central Mechanisms in Dysosmia: A Pilot Study Using Electrobulbogram (EBG), Functional MRI (fMRI), and Diffusion-Weighted Imaging (DWI)

Background: Loss of the sense of smell can seriously affect a person's quality of life. The ability to smell can be damaged by many factors, including illnesses, injuries, and exposure to toxic chemicals. The effects can vary, including complete loss of smell, partial loss, and parosomia, which is when things smell differently than they should. Objective: To study how brain function changes in people with different types of smell disorders. Also, to look at how smell loss affects quality of life over time. Eligibility: People aged 18 years or older with a disorder that affects their sense of smell. Healthy volunteers are also needed. Design: Participants will have 5 study visits over 1 year. They will have various tests and procedures: Smell tests. They will have several tests that involve smelling different items and answering questions. Questionnaires. They will answer questions about their health, mood, sense of smell, and daily habits. Magnetic resonance imaging (MRI) scans. They will lie on a bed that slides into a tube. Padding will hold their head still. They will smell different odors while in the scanner. Electrobulbogram (EBG). They will wear a soft cap with sensors that measure brain activity. They will smell different odors while wearing the cap. Nasal endoscopy. A flexible tube will be inserted into a nostril to view the inside of the nose. Biopsy. A numbing substance will be sprayed into the nose. Then a scissor-like tool will be used to collect a sample of tissue from one or both nasal passages. Samples of blood, urine, and nasal fluid will be taken.

Gender: All

Ages: 18 Years - 99 Years

Updated: 2026-05-29

1 state

Respiratory Tract Infection
Smell Disorder
Influenza
+7
ACTIVE NOT RECRUITING

NCT05799521

A Nasal Treatment for COVID-19

The goal of this study is to test an investigational new inhaled medication called Optate.

Gender: All

Ages: 18 Years - 60 Years

Updated: 2026-05-28

1 state

COVID-19
Healthy
COMPLETED

NCT07610512

A Prospective Study to Determine the Immunomodulatory Effect of Probiotics on the Immunogenicity of Anti-SARS-CoV-2 Vaccine Recipients Study.

This study aims to evaluate whether oral probiotic supplementation can modulate the immune response induced by COVID-19 vaccination. Specifically, the study will assess the effects of probiotics on vaccine-induced antibody responses and cellular immune responses, and explore whether probiotics may enhance or accelerate immunity and reduce vaccine-related adverse effects. A total of 140 participants are planned to be enrolled.

Gender: All

Ages: 20 Years - 65 Years

Updated: 2026-05-28

COVID-19
Immune Response
RECRUITING

NCT05218083

REmotely Monitored, Mobile Health Supported Multidomain Rehabilitation Program With High Intensity Interval Training for COVID-19

Multicenter, prospective, randomized controlled trial providing mobile health supported physical rehabilitation to 120 patients who have been critically ill with COVID-19 and who complete at least one exercise session.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-28

5 states

COVID-19
Critical Illness
ICU Acquired Weakness
+2
RECRUITING

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

SARS-CoV-2 Infection
COVID-19
Coronavirus
COMPLETED

NCT04460170

COVID-19 Follow up Intensive Care Studies

Since the SARS-CoV-2 infection is relatively new, the long term attributable burden related to COVID19 has not been investigated yet. To date, in patients with COVID-19 and their family members, there is little information on the functional status, cognitive ability, pattern of return to work, and health related quality of life after the ICU admission. This study aims to describe the psychological wellbeing, physical - and social functioning of COVID-19 ICU survivors and their family members up to 12 months following ICU discharge.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-26

Quality of Life
COVID-19
ACTIVE NOT RECRUITING

NCT04411147

A Longitudinal Study of COVID-19 Sequelae and Immunity

Background: COVID-19 is a disease caused by the SARS-CoV-2 virus. It infects the respiratory tract. Some people who get COVID-19 have only mild symptoms. But for others, infection leads to pneumonia, respiratory failure, and, in some cases, death. Researchers want to learn more about any effects that may persist after people recover from COVID-19. Objective: To learn about any long-term medical problems that people who have recovered from COVID-19 might have, and whether they develop an immune response to SARS-CoV-2 that provides protection against reinfection. Eligibility: People age 18 and older who have recovered from documented COVID-19 or were in close contact with someone who had COVID-19 but did not get the infection Design: Participants will be screened over 2 visits. During visit 1, they will answer questions about any symptoms they are having and will be tested for SARS-CoV-2 infection which will involve a nasal swab sample or other FDA approved test. If the test is negative, they will proceed to the second visit, which will include: Physical examination Medical history Mental health interview (which may be recorded if the participant agrees) Chest x-ray (for recovered COVID-19 participants only) Blood and urine tests Pregnancy test (if needed) Lung function test (for recovered COVID-19 participants only) 6-minute walk test (for recovered COVID-19 participants only) Questionnaires about their general and mental health Leukapheresis to collect white blood cells (optional). Participants will be put into 1 of 2 groups: the COVID-19 group or the close contact group. Participants will have study visits every 6 months for 3 years. They will repeat some of the screening tests. Participants in the COVID-19 group may have visits more often if they develop symptoms that suggest re-infection with SARS-CoV-2.

Gender: All

Ages: 18 Years - 120 Years

Updated: 2026-05-22

1 state

COVID-19
ENROLLING BY INVITATION

NCT05369611

COVID-19 Experiences in the SELF Cohort

Background: COVID-19 affected African Americans more than Whites. African Americans, especially women, have had higher rates of COVID-19 infections compared to Whites. They are also more likely to go to the hospital or die of this disease. Many researchers who looked into these issues lacked background data on the people they studied. SELF is a 10-year study of fibroids in African American women aged 23-35. Researchers already have a lot of data on these women. Asking how COVID-19 affected them can add context other studies lack. Objective: To describe the impact of the COVID-19 pandemic on young African American women and their families. Eligibility: Participants must be enrolled in SELF (Study of Environment, Lifestyle, and Fibroids). Design: Researchers will invite all women enrolled in SELF to participate in this natural history study. Participants will complete one questionnaire. They will answer the questions online. They may also choose to get a paper copy sent by mail. The survey will take no more than 15-20 minutes. All questions will relate to COVID-19. Participants will be asked if they had COVID-19. They will be asked if family, friends, or members of their community did. They will answer questions about their vaccine status and access to health care services. Participants will also answer questions about how the pandemic affected their lives. They will be asked about their job and if finding childcare was a challenge. They will be asked about money problems and how they coped. They will be asked about sleep problems and emotional distress. Participants will get a $30 gift card after they finish the survey.

Gender: FEMALE

Ages: 23 Years - 35 Years

Updated: 2026-05-22

1 state

COVID-19
COMPLETED

NCT05468736

Study to Evaluate Safety and Immunogenicity of COVID-19 Vaccine in Children 6 Months to < 12 Years

This is a Phase 2/3 randomized, observer-blinded, placebo-controlled, age de-escalation trial to evaluate the safety and immunogenicity of 2 primary doses of SARS-CoV-2 rS with Matrix-M™ adjuvant (NVX-CoV2373) given 21 days apart and NVX CoV2373 or a variant-based vaccine given as a booster dose or at crossover in pediatric participants (3 age cohorts; 6 to \< 12 years, 2 to \< 6 years, and 6 to \< 24 months of age). Each age cohort will be conducted in 2 parts starting with the oldest age cohort (6 to \< 12 years of age).

Gender: All

Ages: 6 Months - 11 Years

Updated: 2026-05-22

41 states

COVID-19
RECRUITING

NCT01306084

Viral Infections in Healthy and Immunocompromised Hosts

Background: \- Viral infections are an important cause of illness and death in hospitalized patients as well as outpatients. New strains of viruses may appear and infect both healthy people and those with weak immune systems. A better understanding of these new virus strains (such as SARS-CoV-2, the virus that causes COVID-19) may help to control and prevent these infections. In particular, some viral infections that are less problematic in healthy persons can be life threatening in persons with weak immune systems, and viruses may be able to evolve more rapidly in persons with weak immune systems and therefore develop resistance to existing treatments. Researchers are interested in collecting samples and information from otherwise healthy persons or persons with weak immune systems to study the effects of viruses and their development. Objectives: \- To collect samples and data from individuals who have been exposed to or have contracted viral infections. Eligibility: * Individuals of all ages who have been diagnosed with a viral infection are suspected to have a viral infection, or have been in close contact with someone with a suspected or actual viral infection that is of interest to investigators in the Laboratory of Infectious Diseases. * Healthy persons and persons with weak immune systems (immunocompromised individuals) are eligible to participate. Design: * Participants will be pre-screened to determine if they meet the eligibility criteria for the trial. * If eligible, evaluation may include a medical chart review, a history and physical examination, review of clinical reports from outside hospitals and laboratories, and review of tissue biopsies. * Study procedures may include collection of blood, urine, saliva, nasal fluid sampling, throat swabs, stool, and genital swabs. For participants who have specimens collected as part of their medical care (e.g. wound swabs, spinal tap, bronchoscopy, liver biopsy etc.), researchers may use leftover specimens from the clinical laboratory for testing. * Specimens may be collected up to 4 times per week during the first 2 weeks after enrollment, and then as many as 2 times per week for up to 2 years. Some participants may be asked to continue providing specimens if there is concern for relapse or recurrence of the infection. * Treatment is not offered under this study.

Gender: All

Ages: 6 Months - 120 Years

Updated: 2026-05-22

1 state

Anogenital Herpes
COVID-19
Herpes Labialis
ACTIVE NOT RECRUITING

NCT06803862

RegiStry Of the multiFaceted medIcal cenTer

This study is a prospective medical registry (the SOFIT Registry) that enrolls all patients hospitalized in various departments of the Tula Regional Clinical Hospital in 2021. The primary objective of the study is to analyze demographic, clinical and anamnestic characteristics of patients, history of COVID-19, the structure of multimorbidity, the quality of diagnostics and treatment, as well as short-term and long-term outcomes. As a part of this project a five-year follow-up is planned. The information will be obtained from Medical Information System resource of the hospital and regional and federal electronic databases.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-20

Chronic Non-communicable Diseases
Cardiovascular Diseases
COVID-19
+1
ENROLLING BY INVITATION

NCT05769023

A Spatial Analysis of Hotspots and Targeted Injection Settings Pilot Intervention for HIV Prevention Among People Who Inject Drugs

Conduct a study of people who use drugs (PWUD) perceptions of and access to COVID-19 vaccines as well as reasons for vaccine hesitancy/barriers

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-20

1 state

COVID-19
RECRUITING

NCT07597876

SMAtteo COvid19 REgistry (SMACORE)

Since the start of the COVID-19, Italy, and particularly the Northern region, Lombardia, has initially been the centre of the most numerous reports of confirmed cases of COVID-19 since the spread of the infection to Europe, reaching 5469 cases out of 9172 total cases in Italy (corresponding to 0.054% of the region population) within 2 weeks from the identification of the first Italian case at the end of February 2020. Data updated at 25 March 2020 reported 7503 deaths out of 57521cases in Italy. The overall number of patients requiring admission to hospital reached 23112, with another 3489 needing intensive care unit (ICU) management (4). The "Fondazione IRCCS Policlinico San Matteo" Pavia's main teaching and research hospital has become one of the main COVID Centers for the treatment of the disease. Several departments have been reassigned to the sole hospitalization of COVID-19 patients in addition to the Infectious Disease Department and the Intensive Care (ICU). Moreover, a dedicated emergency room (ER) has been set up. All these measures have given rise to a large amount of clinical, imaging and laboratory data originating from different sources as well data regarding to type and length of stay in each of the ER, medical departments and ICU, that are of use for diagnostic and prognostic purposes. Also the Fondazione IRCCS Policlinico San Matteo has information obligations towards the Regional (Regione Lombardia) and National (Istituto Superiore di Sanità, ISS) authorities. For these reasons we plan to set up a structured registry to collect these information on our Covid-19 patients using the secured REDCap platform resident on a server of the local Informative Services.

Gender: All

Updated: 2026-05-19

COVID-19
COMPLETED

NCT04477889

Methodist Health System COVID-19 Patient Registry

This is a prospective cohort observational registry study that will include data on all patients who are treated at MHS facilities for COVID-19.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-19

1 state

COVID-19
RECRUITING

NCT07089706

A Study to Evaluate the Immunogenicity and Safety of mRNA-1283 COVID-19 Variant-containing Formulations

The purpose of this study is to evaluate the immunogenicity and safety of the recommended variant-containing formulations of mRNA-1283 COVID-19 vaccine (mNEXSPIKE®) within the current epidemiological environment.

Gender: All

Ages: 12 Years - Any

Updated: 2026-05-19

4 states

COVID-19
WITHDRAWN

NCT05110651

The Danish Pre-HCQ COVID Dialysis Study

Hydroxychloroquine has been shown to inhibit replication of SARS-CoV-2 in vitro. The presented multicenter parallel-group open-label randomized clinical trial aims to investigate the efficacy of prophylactic hydroxychloroquine on mitigation of risk of hospitalization due to COVID-19 in patients with end-stage renal disease.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-19

3 states

COVID-19
End Stage Renal Disease
RECRUITING

NCT03808922

Phase III DAS181 Lower Tract PIV Infection in Immunocompromised Subjects (Substudy: DAS181 for COVID-19): RCT Study

This study will seek to enroll immunocompromised patients with Lower Tract parainfluenza infection. It also contains a sub-study to enroll patients with severe COVID-19.

Gender: All

Updated: 2026-05-18

36 states

Lower Respiratory Tract Infection
Parainfluenza
Immunocompromised
+1
RECRUITING

NCT07536308

A Safety and Immunogenicity Trial of OCU500, ChAd36 Vector Encoding SARS-CoV-2 Spike Vaccine Via Intranasal and Inhalational Routes in Previously Vaccinated Adults

This phase 1 randomized, open-label, dose-escalation clinical trial evaluates the safety and immunogenicity of OCU500, a ChAd36 Vector Encoding SARS-CoV-2 Spike Vaccine, in healthy adults aged 18-64 who previously completed a primary COVID-19 vaccination series and at least one booster. The study evaluates two dose levels (1×10\^10 viral particles (VP) and 5×10\^10 VP) and two routes of administration (intranasal and inhaled). The trial includes 80 participants across four study arms (20 per arm). The primary objective is to evaluate the safety and reactogenicity of a single dose of OCU500 administered in previously vaccinated healthy adults.

Gender: All

Ages: 18 Years - 64 Years

Updated: 2026-05-15

5 states

COVID-19
RECRUITING

NCT07298434

Study of VYD2311 for the Prevention of COVID-19

The main purpose of this study is to test an investigational drug known as VYD2311, which is being developed to lower the risk of getting COVID-19. VYD2311 is a monoclonal antibody that attaches to the virus that causes COVID-19 and helps block it from entering your cells. It is being tested in adults and adolescents at least 12 years old. Participants in this study will be given a "study drug" that will be either VYD2311 or placebo. The study drug will be given as a shot into the muscle in the participant's upper thigh or upper arm once a month with a total of 3 shots during the study. This study will help researchers see how well VYD2311 works to prevent COVID-19 during the 90 days after the first shot. The study will also look at the safety and tolerability of VYD2311, how the study drug is processed by the body (pharmacokinetics), how the immune system reacts to the study drug (immunogenicity), and how well VYD2311 can block the virus from infecting cells (neutralization). To do these tests, your blood will be drawn at certain times during the study.

Gender: All

Ages: 12 Years - 100 Years

Updated: 2026-05-15

16 states

COVID-19
ACTIVE NOT RECRUITING

NCT07095231

Safety, Reactogenicity, and Immunogenicity Trial of STX-S SARS-CoV-2 Vaccine in Adults

This phase 1 clinical trial will evaluate the safety, reactogenicity, and immunogenicity of STX-S in adults who have previously received a primary series and at least one booster with an authorized or licensed SARS-CoV-2 parenteral vaccine. The study is designed as a non-randomized, open-label, dose-escalation clinical trial evaluating three dose levels of STX-S. A sample size of 60 participants (20 participants per dose cohort) is anticipated. The primary objective is to evaluate the safety and reactogenicity of a single intramuscular injection of three different dose levels (25 ng, 50 ng, and 125 ng) of STX-S in previously vaccinated healthy adults

Gender: All

Ages: 18 Years - 64 Years

Updated: 2026-05-15

2 states

COVID-19
ACTIVE NOT RECRUITING

NCT05467930

CU-COMMITS: COVID-19 Care in Black and Latino Communities and Households. Clinical and Molecular Outcomes of SARS-CoV-2

The purpose of this study is to describe the long-term health effects of COVID-19 in a population of mostly Black and Latinx individuals and their households who were diagnosed with COVID-19 at Columbia University Irving Medical Center. In New York, the upper Manhattan and south Bronx communities neighboring Columbia University Irving Medical Center (CUIMC) have been two of the most impacted communities of the COVID-19 pandemic. These neighborhoods are predominantly non-Hispanic black or African American and Latinx. This study will invite people who tested positive for COVID-19 and/or were treated at Columbia University Irving Medical Center to: 1) take a survey to ask about current symptoms and any health problems and 2) ask permission to review COVID-related health history including COVID-19 testing results (from the medical record) since infection to learn about health effects after COVID-19 infection; 3) invite anyone in their household to take a survey; and 4) for up to 500 patients who were hospitalized for COVID, give the option of doing a nasal swab to test for SARS-CoV-2 virus and blood test to check for antibody up to 12 months after diagnosis, to compare how results are different 12 months after infection. The goal is to learn about how the severity of person's infection in 2020 influences long term health effects and how others in their household are impacted by COVID-19.

Gender: All

Ages: 18 Years - Any

Updated: 2026-05-15

1 state

COVID-19
SARS CoV 2 Infection