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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Immunization; Infection Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Beta-glucan and Immune Response to Influenza Vaccine

NCT05074303
View directory record Official record
Conditions
Healthy Aging
Interventions
Influenza Vaccine, Beta-glucan, Placebo
Biological · Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
50 Years to 100 Years
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Sep 24, 2026, 4:03 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Motivational Interviewing for Vaccine Uptake in Latinx Adults

NCT06062056
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
EHR alert, Motivational Interviewing, Warm hand off to nurse
Other · Behavioral
Lead sponsor
Boston College
Other
Eligibility
18 Years and older
Enrollment
3,698 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

2013/2017 H7N9 Prime-Boost Interval

NCT03589807
View directory record Official record
Conditions
Avian Influenza, Influenza Immunisation
Interventions
A/H7N9, AS03, Influenza Virus Vaccine, Monovalent A/H7N9 A/Shanghai/2/2013, Phosphate Buffered Saline (PBS) diluent
Biological · Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
19 Years to 50 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
6
States / cities
Atlanta, Georgia • Decatur, Georgia • Iowa City, Iowa + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2021 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Results available

The Effect of HPV Vaccination on Recurrence Rates in HIV Patients With Condylomata

NCT00941889
View directory record Official record
Conditions
HIV Positive, Anal Condylomata, Anal Warts, HIV Infections
Interventions
Saline, Quadrivalent Human Papillomavirus (Types 6,11,16,18) Recombinant Vaccine
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 24, 2016 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Results available

Nudging Patients to Increase Shingles Vaccination

NCT06238726
View directory record Official record
Conditions
Shingles, Vaccination Behavior, Behavior, Health
Interventions
Reminder
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
50 Years and older
Enrollment
50,786 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immune Response to Preventive HIV Immunization With Adenovirus Serotype 5 or 35 Vector

NCT00801697
View directory record Official record
Conditions
HIV Infections
Interventions
DNA Vaccine, DNA Vaccine placebo, rAd35, rAd35 placebo, rAd5, rAd5 placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
192 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
10
States / cities
Birmingham, Alabama • San Francisco, California • Decatur, Georgia + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 13, 2021 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Vaccination for Middle Ear Infection

NCT00001605
View directory record Official record
Conditions
Otitis Media
Interventions
Nontypeable Haemophilus influenzae
Biological
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2001
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 24, 2026, 4:03 PM EDT
Active, not recruiting Phase 2 Interventional

High vs. Standard Dose Influenza Vaccine in Lung Allograft Recipients

NCT05215327
View directory record Official record
Conditions
Immunization; Infection, Transplantation Infection, Influenza
Interventions
High Dose Quadrivalent Inactivated Influenza Vaccine, Standard Dose Quadrivalent Inactivated Influenza Vaccine
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
16 Years and older
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Pneumonia Vaccine in Aging HIV Positive Individuals

NCT02558751
View directory record Official record
Conditions
Pneumococcal Infection
Interventions
23-valent pneumococcal polysaccharide vaccine, 13-valent pneumococcal conjugate vaccine
Biological
Lead sponsor
University of Toledo Health Science Campus
Other
Eligibility
50 Years to 65 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Toledo, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 23, 2015 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Planning Message Recommending Same Time/Location as Last Vaccine

NCT05612386
View directory record Official record
Conditions
COVID-19
Interventions
COVID Booster text messages
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
520,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional

Phase I Protocol for the Evaluation of the Safety and Immunogenicity of Vaccination With Synthetic HIV Envelope Peptides in Patients With Early Human Immunodeficiency Virus Infection

NCT00001386
View directory record Official record
Conditions
Acquired Immunodeficiency Syndrome, HIV Infection
Interventions
PCLUS 3-18 MN, PCLUS 6.1 MN
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Not listed
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Efficacy of Immunization With 4C-MenB in Preventing Experimental Urethral Infection With Neisseria Gonorrhoeae

NCT05294588
View directory record Official record
Conditions
Gonorrhea Male
Interventions
Cefixime, Ceftriaxone, Ciprofloxacin, Neisseria gonorrhoeae strain FA1090, Meningococcal Group B Vaccine, Influenza Vaccine, Tetanus-diptheria Vaccine
Drug · Biological
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

H5N1 With or Without Topical Aldara in Healthy Adults

NCT03472976
View directory record Official record
Conditions
Avian Influenza, Influenza Immunisation
Interventions
Aqueous Cream B.P., Imiquimod, Influenza Virus Vaccine, Monovalent A/H5N1 A/Vietnam/1203/04
Other · Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 23, 2020 · Synced Sep 24, 2026, 4:03 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 Sep 24, 2026, 4:03 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

A Study to Learn About mRNA Vaccines Against Influenza in Adults

NCT07431853
View directory record Official record
Conditions
Healthy Adults
Interventions
Vaccine Candidate #1, Vaccine Candidate #2, Vaccine Candidate #3, Vaccine Candidate #4, Vaccine Candidate #5, Vaccine Candidate #6, TIV1 or TIV2
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
770 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
15
States / cities
Mobile, Alabama • Walnut Creek, California • Milford, Connecticut + 12 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Sep 24, 2026, 4:03 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 11, 2025 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional

Vaccination of HIV-1 Infected Patients With Dendritic Cells in Addition to Antiretroviral Treatment - (DALIA Trial)

NCT00796770
View directory record Official record
Conditions
HIV
Interventions
Dendritic Cell Vaccine
Biological
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jun 11, 2017 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Intervention to Reduce Diaper Need and Increase Use of Pediatric Preventive Care

NCT03490045
View directory record Official record
Conditions
Diaper Dermatitis, Urinary Tract Infections, Infection, Depressive Symptoms, Stress
Interventions
Diaper Incentive, Conditional Cash Transfer Condition
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older · Female only
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
2
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 23, 2023 · Synced Sep 24, 2026, 4:03 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Tdap Vaccination for Infant Caregivers

NCT01233401
View directory record Official record
Conditions
Pertussis, Vaccination
Interventions
Survey
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years to 64 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 27, 2011 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional

Evaluation of Trimer 4571 Therapeutic Vaccination in Adults Living With HIV on Suppressive Antiretroviral Therapy

NCT04985760
View directory record Official record
Conditions
HIV Infections
Interventions
Trimer 4571 vaccine 100mcg with 500mcg alum adjuvant, Placebo control for Trimer 4571 vaccine 100mcg with 500mcg alum adjuvant, Trimer 4571 vaccine 500mcg with 500mcg alum adjuvant, Placebo control for Trimer 4571 vaccine 500mcg with 500mcg alum adjuvant
Biological
Lead sponsor
Madhu Chhanda Choudhary
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
2
States / cities
Columbus, Ohio • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Blood-Stage Plasmodium Vivax Cell Bank

NCT05095272
View directory record Official record
Conditions
Malaria
Interventions
HMPBS02-Pv
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 10, 2023 · Synced Sep 24, 2026, 4:03 PM EDT
Completed No phase listed Observational Results available

The Impact of Vaccination on Severity of Illness in COVID-19

NCT04912700
View directory record Official record
Conditions
Covid19
Interventions
COVID-19 vaccine
Biological
Lead sponsor
Corewell Health East
Other
Eligibility
18 Years and older
Enrollment
11,834 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 29, 2021 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Results available

A Digital Flu Intervention for People With Cardiovascular Conditions

NCT04584645
View directory record Official record
Conditions
Cardiovascular Diseases, Atrial Fibrillation, Abnormal Heart Rhythms, Cardiac Arrest, Heart Attack, Myocardial Infarction, Coronary Heart Disease, Heart Failure, Stroke, Cerebrovascular Accident
Interventions
Targeted digital intervention
Other
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years and older
Enrollment
49,138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Jun 20, 2022 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Anthrax AV7909 Liquid vs Lyophilized

NCT04660201
View directory record Official record
Conditions
Anthrax, Anthrax Immunisation
Interventions
AV7909
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 18, 2024 · Synced Sep 24, 2026, 4:03 PM EDT