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ClinicalTrials.gov public records Last synced Oct 21, 2026, 10:24 PM EDT

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Showing 433–456 of 1,351 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Immunization Clear all
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Vaccine Responses to SARS-CoV-2 and Other Emerging Infectious Diseases

NCT05078905
View directory record Official record
Conditions
COVID-19, Vaccination, Healthy Volunteer
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2050
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional Results available

Precision Vaccine Promotion in Underserved Populations

NCT05537441
View directory record Official record
Conditions
Influenza, Vaccine Hesitancy
Interventions
Text messaging
Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
6 Months and older
Enrollment
228,831 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 1, 2024 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 2 Interventional

Evaluation of the Immunogenicity of Vaccination With Multiple Synthetic Melanoma Peptides With Granulocyte-macrophage Colony-stimulating Factor (GM-CSF)-In-Adjuvant, in Patients With Advanced Melanoma

NCT00938223
View directory record Official record
Conditions
Melanoma
Interventions
4-peptide and 12-peptide melanoma vaccines
Biological
Lead sponsor
Craig L Slingluff, Jr
Other
Eligibility
18 Years to 85 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated May 2, 2018 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

COVID-19 Vaccine Messaging, Part 1

NCT04460703
View directory record Official record
Conditions
Vaccination, COVID-19
Interventions
Control message, Baseline message, Personal freedom message, Economic freedom message, Self-interest message, Community interest message, Economic benefit message, Guilt message, Embarrassment message, Anger message, Trust in science message, Not bravery message
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 5, 2022 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Discussing COVID-19 Vaccines in Private Facebook Groups

NCT05422898
View directory record Official record
Conditions
COVID-19
Interventions
Gist messages on COVID-19 vaccination, COVID-19 vaccine information
Behavioral
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Enrollment
508 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Promoting Flu Vaccination Through a Mobile Wellness Program

NCT02908893
View directory record Official record
Conditions
Not Condition-specific
Interventions
In-app and push notification mobile messages
Behavioral
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years to 65 Years
Enrollment
50,286 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Santa Barbara, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Transcutaneous Immunization With an Attenuated Listeria Monocytogenes Vector Vaccine

NCT01311817
View directory record Official record
Conditions
Healthy Volunteers
Interventions
BMB72 (actA/plcB-deleted Listeria monocytogenes expressing influenza A nucleoprotein)
Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 55 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 2, 2015 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Cross-vaccination Study of GSK Biologicals' Herpes Zoster Subunit (HZ/su) Vaccine (GSK 1437173A) in Subjects Who Previously Received Placebo in ZOSTER-006 (NCT01165177) and ZOSTER-022 (NCT01165229) Studies.

NCT02690207
View directory record Official record
Conditions
Herpes Zoster
Interventions
Herpes Zoster Vaccine GSK1437173A
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
50 Years and older
Enrollment
8,687 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
37
States / cities
Mesa, Arizona • Phoenix, Arizona • Tucson, Arizona + 31 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2021 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

PfSPZ Vaccine: Dose Optimization With Heterologous Challenge in Healthy Malaria-Naïve Adults

NCT02601716
View directory record Official record
Conditions
Malaria
Interventions
PfSPZ Vaccine, CHMI (7G8), CHMI (NF135.C10)
Biological
Lead sponsor
Sanaria Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Baltimore, Maryland • Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 16, 2018 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional

Opting In vs Opting Out

NCT01233804
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Opting Out
Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older · Female only
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
2
States / cities
Galveston, Texas • Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 31, 2018 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Acetaminophen Before Vaccines for Infants Study (AVIS)

NCT00325819
View directory record Official record
Conditions
Fever
Interventions
Acetaminophen, placebo
Drug · Other
Lead sponsor
Kaiser Permanente
Other
Eligibility
6 Weeks to 9 Months
Enrollment
374 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2009
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 13, 2017 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

4 Pillars Toolkit for Adolescent Vaccination

NCT02165722
View directory record Official record
Conditions
Adolescent HPV Vaccine, Adolescent Influenza Vaccine
Interventions
4 Pillars Toolkit
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
11 Years to 17 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 28, 2018 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Vouchers to Promote Tdap Vaccination

NCT01860378
View directory record Official record
Conditions
Whooping Cough
Interventions
Full price, $5 off
Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
18 Years and older
Enrollment
149 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 3, 2015 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 1Phase 2 Interventional Results available

HIV-1-Gag Conserved-Element DNA Vaccine (p24CE) Vaccine Study

NCT03560258
View directory record Official record
Conditions
HIV Infections
Interventions
p24CE1/2 pDNA vaccine, p24CE1/2 pDNA vaccine admixed with full-length p55^gag pDNA vaccine, Full-length p55^gag pDNA vaccine, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
14
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 9 more
Source: ClinicalTrials.gov public record
Updated Apr 26, 2022 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 1 Interventional

Vaccine Therapy Plus QS21 in Treating Patients With Progressive Prostate Cancer

NCT00003819
View directory record Official record
Conditions
Prostate Cancer
Interventions
QS21, TF(c)-KLH conjugate vaccine, Thomsen-Friedenreich antigen, keyhole limpet hemocyanin
Biological
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older · Male only
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 19, 2013 · Synced Oct 21, 2026, 10:24 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Pilot Study of the Patterns of Cellular Gene Expression in HIV-1 Patients Following Clinical Events Which Increase Plasma Virus Concentrations

NCT00001681
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Assess the Safety & Immunogenicity of Prime-Boost Vaccination Strategies Using H5Nx Virus Vaccine Adjuvanted With AS03 or MF59

NCT03497845
View directory record Official record
Conditions
Influenza A Virus, H5N1 Subtype
Interventions
VN, IN, dk/BANG, gf/WA, bhg/QL, AS03 adjuvant, MF59 adjuvant
Biological
Lead sponsor
Biomedical Advanced Research and Development Authority
Federal
Eligibility
18 Years to 49 Years
Enrollment
720 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
6
States / cities
San Diego, California • Peoria, Illinois • Lenexa, Kansas + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 14, 2020 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

GARDASIL 9: 3 Dose vs. 2 Dose With Delayed 3rd Dose

NCT03943875
View directory record Official record
Conditions
Immunization, Efficacy, Human Papilloma Virus
Interventions
9-valent HPV vaccine, 2 dose efficacy, 9-valent HPV vaccine, 3 doses standard timing
Biological
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
15 Years to 26 Years
Enrollment
767 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Not applicable Interventional

Treatment of Autistic Children Using NAET Procedures

NCT00277407
View directory record Official record
Conditions
Autism, Food Allergies
Interventions
NAET with acupressure and/or chiropractic procedures
Procedure
Lead sponsor
Nambudripad's Allergy Research Foundation
Other
Eligibility
3 Years to 10 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Buena Park, California
Source: ClinicalTrials.gov public record
Updated May 7, 2007 · Synced Oct 21, 2026, 10:24 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Immunological Responses of COVID-19 Vaccination

NCT05238467
View directory record Official record
Conditions
Cancer; Chemotherapy
Interventions
COVID antibody titers in the blood
Other
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 21, 2023 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Study of CAP1-6D in Patients With Locally Advanced or Surgically Resected Pancreatic Adenocarcinoma

NCT00203892
View directory record Official record
Conditions
Pancreatic Adenocarcinoma
Interventions
modified CEA peptide (10mcg), modified CEA peptide (100mcg), modified CEA peptide (1000mcg)
Biological
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 16, 2014 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 1Phase 2 Interventional

Vaccine (ALVAC-HIV vCP1452) Use and Intermittent Withdrawal of Anti-HIV Drugs in Patients With HIV

NCT00011011
View directory record Official record
Conditions
HIV Infections
Interventions
ALVAC(2)120(B,MN)GNP (vCP1452)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2006
U.S. locations
16
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Nov 1, 2021 · Synced Oct 21, 2026, 10:24 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Annual Study for Collection of Serum Samples in Children and Older Adults Receiving the 2020-2021 Formulations of Fluzone Quadrivalent Vaccine and Fluzone High-Dose Quadrivalent Vaccine, Respectively

NCT04551677
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Fluzone Quadrivalent vaccine, No Preservative (0.5-mL dose), 2020-2021 formulation, Fluzone High-Dose Quadrivalent vaccine (0.7-mL dose), 2020-2021 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months to 84 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
2
States / cities
Bardstown, Kentucky • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 12, 2025 · Synced Oct 21, 2026, 10:24 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Investigating the Effectiveness of a Seasonal Influenza Vaccination Promotion Campaign for Members of a Non-Profit, Community-Based Health Insurance Plan: 2018-2019

NCT03700281
View directory record Official record
Conditions
Influenza, Vaccination
Interventions
Messaging, Incentive
Behavioral
Lead sponsor
The University of Texas Health Science Center at Tyler
Other
Eligibility
18 Years and older
Enrollment
22,584 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Apr 23, 2019 · Synced Oct 21, 2026, 10:24 PM EDT