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ClinicalTrials.gov public records Last synced Jun 10, 2026, 2:27 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: COVID-19 Immunisation Clear all
Terminated Not applicable Interventional Results available

PROmotion of COvid-19 VA(X)Ccination in the Emergency Department - PROCOVAXED

NCT05142332
View directory record Official record
Conditions
Covid-19 Vaccine, Vaccine Hesitancy
Interventions
Covid-19 vaccine education materials
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
541 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
7
States / cities
San Francisco, California • Durham, North Carolina • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional Results available

SCALE-UP Utah II: Community-Academic Partnership to Address COVID-19 Text Message Study

NCT05533918
View directory record Official record
Conditions
COVID-19
Interventions
Text-Messaging (TM), Patient Navigation (PN)
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
31,439 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 15, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Completed No phase listed Observational

Immune Responses to COVID-19 Infection or Vaccination

NCT05379478
View directory record Official record
Conditions
COVID-19
Interventions
Laboratory assessment of antibody profiles
Diagnostic Test
Lead sponsor
Aditxt, Inc.
Industry
Eligibility
18 Years and older
Enrollment
403 participants
Timeline
2020 – 2023
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 6, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

COVIDVaxStories: Randomized Trial to Reduce COVID-19 Vaccine Hesitancy in Populations of Color

NCT06297876
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
Storytelling, Learn More (Active Comparator)
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 105 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Jun 10, 2026, 2:27 PM EDT
Recruiting No phase listed Observational

COVID-19 Transmission and Morbidity in Malawi

NCT05973084
View directory record Official record
Conditions
SARS CoV 2 Infection, SARS CoV 2 Vaccination
Interventions
Not listed
Lead sponsor
Boston University
Other
Eligibility
5 Years to 75 Years
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccinations With a Sweepstakes

NCT04951310
View directory record Official record
Conditions
Covid19
Interventions
Philly Vax Sweepstakes
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
3,827,656 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 2, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Working Towards Empowered Community-driven Approaches to Increase Vaccination and Preventive Care Engagement

NCT05841810
View directory record Official record
Conditions
COVID-19
Interventions
mHealth Outreach, Care Coordination
Other
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
398 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
4
States / cities
El Cajon, California • Escondido, California • La Jolla, California + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

COVID-19 Oral and Subcutaneous Vaccination Using a 2nd Generation (E1/E2B/E3-Deleted) Adenovirus Platform in Healthy Volunteers in USA

NCT04732468
View directory record Official record
Conditions
Covid19
Interventions
hAd5-S-Fusion+N-ETSD (Suspension for injection), hAd5-SFusion+ N-ETSD (Oral capsule)
Biological · Drug
Lead sponsor
ImmunityBio, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
2
States / cities
El Segundo, California • Newport Beach, California
Source: ClinicalTrials.gov public record
Updated Oct 14, 2024 · Synced Jun 10, 2026, 2:27 PM EDT
Completed No phase listed Observational

Coronavirus Disease 2019 (COVID-19) Vaccination in Cancer Patients

NCT04953065
View directory record Official record
Conditions
Malignancies Multiple
Interventions
COVID-19 vaccine hesitancy and acceptance survey
Other
Lead sponsor
Monika Joshi
Other
Eligibility
18 Years to 89 Years
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 8, 2024 · Synced Jun 10, 2026, 2:27 PM EDT
Completed No phase listed Observational

Host Immune Response to Novel RNA COVID-19 Vaccination

NCT04784689
View directory record Official record
Conditions
COVID-19 Vaccine, Cancer
Interventions
COVID-19 Vaccine
Biological
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
50 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 24, 2023 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Video Messages and Vaccination Intention

NCT04979416
View directory record Official record
Conditions
COVID-19 Vaccination
Interventions
Video messages
Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
1,001 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 9, 2021 · Synced Jun 10, 2026, 2:27 PM EDT
Not yet recruiting Phase 2 Interventional

Effect of Metabolic Modulation on a Post-acute COVID-19 Vaccination Syndrome (PACVS) Cohort

NCT06967428
View directory record Official record
Conditions
Vaccine Adverse Reaction, Post Acute Covid-19 Vaccination Syndrome
Interventions
Combined metabolic modulator, Rice Protein Powder with Vitamin C
Combination Product · Dietary Supplement
Lead sponsor
Independent Medical Alliance
Other
Eligibility
16 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 12, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Increasing COVID-19, Influenza, and Pneumonia Vaccine Uptake

NCT04761692
View directory record Official record
Conditions
Covid19, Influenza, Pneumonia, Vaccine Refusal
Interventions
Full VEPMP Intervention, Partial VEPMP Intervention, Delayed VEPMP Intervention
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
65 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 18, 2022 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study on the Immune Response and Safety of the Shingles Vaccine and the Influenza Vaccine When Either is Given to Healthy Adults at the Same Time or Following a COVID-19 Booster Vaccine

NCT05047770
View directory record Official record
Conditions
Herpes Zoster
Interventions
HZ/su, Flu D-QIV, mRNA-1273
Biological · Combination Product
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
2,013 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
46
States / cities
Tempe, Arizona • Oxnard, California • San Diego, California + 40 more
Source: ClinicalTrials.gov public record
Updated Nov 12, 2023 · Synced Jun 10, 2026, 2:27 PM EDT
Not listed No phase listed Observational

Immune Response Following COVID-19 Vaccination

NCT04736524
View directory record Official record
Conditions
IgM and IgG in Blood
Interventions
Rapid antibody test
Other
Lead sponsor
Texas Cardiac Arrhythmia Research Foundation
Other
Eligibility
16 Years to 85 Years
Enrollment
500 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Feb 2, 2021 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study of a Quadrivalent High-Dose Influenza Vaccine and a Moderna COVID-19 Vaccine Administered Either Concomitantly or Singly in Participants 65 Years of Age and Older Previously Vaccinated With a 2-dose Schedule of Moderna COVID-19 Vaccine

NCT04969276
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Quadrivalent Inactivated Influenza High Dose, COVID-19 mRNA Vaccine (nucleoside modified)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
65 Years and older
Enrollment
306 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
6
States / cities
Glendale, Arizona • San Diego, California • Vista, California + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional

COVID-19 Vaccination Hesitancy in Adults With Sickle Cell Disease

NCT05998824
View directory record Official record
Conditions
Sickle Cell Disease, COVID-19 Vaccine, Vaccine Hesitancy
Interventions
SCD-specific COVID-19 vaccination information (SCVI) video
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years to 100 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 23, 2024 · Synced Jun 10, 2026, 2:27 PM EDT
Not listed No phase listed Observational

Immunity After COVID-19 Vaccination

NCT04883164
View directory record Official record
Conditions
Immunity to COVID-19
Interventions
Cellular and antibody response to spike antigens of SARS-CoV-2 in both groups in peripheral blood samples
Other
Lead sponsor
Plexision
Industry
Eligibility
18 Years to 100 Years
Enrollment
300 participants
Timeline
2021 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 11, 2021 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccine Text Outreach

NCT04834726
View directory record Official record
Conditions
Covid19
Interventions
Opt-In (Call-Back), Opt-in (In-Bound), Standard Message, Clinician Endorsement, Scarcity, Opt-Out Framing, Phone Call
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
16 Years and older
Enrollment
19,554 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 26, 2023 · Synced Jun 10, 2026, 2:27 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

COVID-19 Health Adjustments in Nutrition, General Wellness, and Exercise

NCT07128095
View directory record Official record
Conditions
COVID-19, Sleep, Immunization; Infection, Physical Inactivity, Blood Pressure, Diet Habit, Mental Health Wellness 1
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Effects of an Investigational COVID-19 Vaccine as Booster in Healthy People

NCT05541861
View directory record Official record
Conditions
SARS-CoV-2 Infection, COVID-19
Interventions
BNT162b2 Bivalent (original/Omicron BA.4/BA.5) 30 mcg, BNT162b4 5 mcg, BNT162b4 10 mcg, BNT162b4 15 mcg, BNT162b4 30 mcg, BNT162b2 Monovalent (OMI XBB.1.5) 30 mcg
Biological
Lead sponsor
BioNTech SE
Industry
Eligibility
18 Years and older
Enrollment
383 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
17
States / cities
Tempe, Arizona • Newport Beach, California • San Diego, California + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Jun 10, 2026, 2:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluating the Immune Response to COVID19 Vaccination in Immunodeficient Patients

NCT05286242
View directory record Official record
Conditions
Multiple Sclerosis, Autoimmune Blistering Disease, B-Cell Deficiency
Interventions
COVID19 vaccine
Biological
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
196 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Boosting COVID-19 Vaccination Uptake Using Wastewater Surveillance

NCT06698497
View directory record Official record
Conditions
Vaccine Uptake
Interventions
Communication Campaign
Behavioral
Lead sponsor
Syracuse University
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Jun 10, 2026, 2:27 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and High-Dose Inactivated Influenza Vaccine in Adult Participants 50 Years of Age and Older

NCT06695117
View directory record Official record
Conditions
COVID-19 Immunization, Influenza Immunization
Interventions
IIV-HD, rC19 (dose 1), IIV-HD + rC19 (dose 1), IIV-HD + rC19 (dose 2), IIV-HD + rC19 (dose 3), IIV-HD + rC19 (dose 4), Placebo (0.9% NaCl)
Biological · Other
Lead sponsor
Sanofi
Industry
Eligibility
50 Years and older
Enrollment
980 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
12
States / cities
Birmingham, Alabama • Huntsville, Alabama • Tucson, Arizona + 9 more
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Jun 10, 2026, 2:27 PM EDT