Study type
Vaccine studies recruiting now
Vaccine trials test how well new or updated vaccines produce an immune response and how they are tolerated. Many recruit healthy adults; some focus on older adults, children or people with specific conditions.
115 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
2 studies with pay posted
Exact amounts posted by the research company for each study. The button opens that study’s own page.
Pays up to
$4,600
Acne Vaccine Study
CenExel · Salt Lake City, UT
Ages 18–45 · Male/Female
View study & apply (opens in a new tab)Opens CenExel’s page for this exact study
Pays up to
$825
Senior Flu Vaccine
CenExel · Salt Lake City, UT
Ages 65+ · Male/Female
View study & apply (opens in a new tab)Opens CenExel’s page for this exact study
More recruiting studies (pay not posted)
- RecruitingHealthy volunteersPhase 1/Phase 2
A Study of BLB-201 RSV Vaccine in Infants and Children
Blue Lake Biotechnology Inc.
- Location
- La Mesa, CA + 13 other US sites
- Eligibility basics
- Ages 6 mo–5
- RecruitingHealthy volunteersPhase 1
A Clinical Trial to Look at the Safety and Immune Responses of the RNA-based Vaccine BNT168 in Adults Living With or Without HIV
BioNTech SE
- Location
- Houston, TX
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 1/Phase 2
Phase 1/2 Study of Respiratory Syncytial Virus and Human Metapneumovirus (RSV+HMPV) Vaccine Candidate in Adults 60 Years of Age and Older
Sanofi
- Location
- Gadsden, AL + 49 other US sites
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteersPhase 1
A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002)
Merck Sharp & Dohme LLC
- Location
- Madera, CA + 14 other US sites
- Eligibility basics
- Ages 2 mo–1
- RecruitingHealthy volunteersPhase 1/Phase 2
A Study of Investigational RSV/hMPV Combination and Investigational hMPV Vaccines in Younger and Older Adults
GlaxoSmithKline
- Location
- Stockbridge, GA + 2 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersPhase 1
DUVAX: A Phase 1 Alzheimer's Vaccine Study Targeting Amyloid-Beta and Tau
Nuravax, Inc.
- Location
- Miami Lakes, FL
- Eligibility basics
- Ages 40–65
- RecruitingHealthy volunteersPhase 1/Phase 2
Study to Assess Safety and Immunogenicity of an Egg-based H5N8 Influenza Vaccine at Multiple Dose Levels Adjuvanted With Matrix-M in Healthy Participants 18 Years of Age and Above.
Sanofi
- Location
- Tempe, AZ + 15 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
A Study to Learn About a Vaccine Against E Coli in Healthy Adults
Pfizer
- Location
- Anaheim, CA + 9 other US sites
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteersPhase 1/Phase 2
A Study on the Safety and Immune Response of a Urinary Tract Infection (UTI) Vaccine in Adults 18-64 Years of Age and Clinical Efficacy in Females 18-64 Years of Age
GlaxoSmithKline
- Location
- Lenexa, KS + 5 other US sites
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteersPhase 1
First in Human Dose Escalation Study Evaluating the Safety and Immunogenicity of IVT's Shigella-04 Vaccine in Healthy Young Adults
Inventprise Inc.
- Location
- Cincinnati, OH
- Eligibility basics
- Ages 18–49
- RecruitingHealthy volunteersPhase 1
Safety and Immunogenicity of a Self-Amplifying RNA Vaccine Against Crimean-Congo Hemorrhagic Fever
HDT Bio
- Location
- San Antonio, TX
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteersPhase 1
Safety and Immunogenicity Study of Revaccination With SCB-1019T in Healthy Adults
Clover Biopharmaceuticals USA, LLC
- Location
- Phoenix, AZ + 4 other US sites
- Eligibility basics
- Ages 60–85
- RecruitingHealthy volunteersPhase 1
Evaluating the Dose, Safety, Tolerability, and Immunogenicity of Mosaic Hexavalent Influenza Vaccine VRCFLUMOS0116-00-VP (FluMos-v2) With and Without ALFQ Adjuvant in Healthy Adults
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 1
A Vaccine (CMV-MVA Triplex Vaccine) for the Enhancement of CMV-Specific Immunity and the Prevention of CMV Viremia in Patients Undergoing Haploidentical Hematopoietic Stem Cell Transplant
City of Hope Medical Center
- Location
- Duarte, CA + 2 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteersPhase 1
A Safety and Immunogenicity Trial of OCU500, ChAd36 Vector Encoding SARS-CoV-2 Spike Vaccine Via Intranasal and Inhalational Routes in Previously Vaccinated Adults
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Decatur, GA + 4 other US sites
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteersPhase 1
Phase 1 Study of CH505 HIV Vaccine Nanoparticles and mRNA Boosters in Healthy Adults
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Boston, MA + 1 other US site
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1
Quadrivalent Influenza HA Stem Vaccine VRC-FLUMOS0122-00-VP (SteMos1) With and Without ALFQ Adjuvant in Healthy Adults
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 1/Phase 2
Safety and Immunogenicity of Recombinant Varicella Zoster Virus Vaccine in People With HIV Who Have a CD4 Count Less Than 300 or Greater Than or Equal to 300 and a Healthy Control Population
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 1
Epstein-Barr Virus (EBV) gH/gL/gp42-Ferritin Nanoparticle Vaccine With or Without gp350-Ferritin in Healthy Adults With or Without EBV Infection
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–29
- RecruitingHealthy volunteersPhase 1
A Clinical Trial to Evaluate the Safety and Immunogenicity of rVSV∆G-MARV-GP Vaccine in Adults in Good General Health
International AIDS Vaccine Initiative
- Location
- Washington D.C., DC + 1 other US site
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 1/Phase 2
Human Immune Response to Ixodes Scapularis Tick Bites
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–99
- RecruitingHealthy volunteersPhase 1
A Clinical Study to Investigate the Safety and Immunogenicity of rVSV∆G-SUDV-GP, a Sudan Virus (SUDV) Vaccine for the Prevention of SUDV Disease in Adults in Good General Health
International AIDS Vaccine Initiative
- Location
- Washington D.C., DC + 2 other US sites
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 1
Testing RG1-VLP Vaccine to Prevent HPV-related Cancers
National Cancer Institute (NCI)
- Location
- Madison, WI
- Eligibility basics
- Ages 18–60 · Women only
- RecruitingHealthy volunteersPhase 1/Phase 2
A Phase 1/2A, Randomized Study of a T Follicular Helper (TFH)-Targeting Genetic Vaccine Strategy Designed to Induce Broad, Durable Immune Responses
Kara Chew
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 40–64
Who these studies look for
Vaccine studies often exclude people who recently received a related vaccine or had the infection, and those with conditions or medicines that affect the immune system.
Matching a page like this one never means you qualify. Each research team decides eligibility at screening.
Questions
Could I receive a placebo?
Often yes. Many vaccine trials are randomized, so some participants receive a comparison vaccine or placebo. The consent document explains this.