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
More recruiting studies (pay not posted)
- RecruitingHealthy volunteersPhase 4
CVD 38000: Study of Responses to Vaccination With Typhoid and/or Cholera
University of Maryland, Baltimore
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
A Vaccine Promotion Package (TweenVax) to Improve Adolescent HPV Vaccination, TweenVax Trial
Emory University
- Location
- Atlanta, GA
- Eligibility basics
- Ages 9+
- RecruitingHealthy volunteersPhase 4
HPV Vaccine Reduced Dose
Emory University
- Location
- Decatur, GA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Screening of Healthy Volunteers for Investigational Antimalarial Drugs, Malaria Vaccines, and Controlled Human Malaria Challenge
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 4
Induction of Cross-protective Antibodies for Serogroup 33 by Pneumococcal Conjugate Vaccines
University of Alabama at Birmingham
- Location
- Birmingham, AL
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
HPV Ends Here: Increasing Uptake of the HPV Vaccine
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 10–12
- RecruitingHealthy volunteers
Fluad vs. Fluzone High-Dose Vaccine Effectiveness Among Adults ≥65 Years
Kaiser Permanente
- Location
- Oakland, CA
- Eligibility basics
- Ages 65+
- RecruitingHealthy volunteersPhase 2
Evaluating Gardasil HPV Vaccine Humoral and Cellular Immune Responses in People With and Without HIV
University of Maryland, Baltimore
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–70 · Men only
- RecruitingHealthy volunteersPhase 4
Durability of Vaccine Responses
Emory University
- Location
- Atlanta, GA + 2 other US sites
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteers
ARISe at UMass Chan
University of Massachusetts, Worcester
- Location
- Worcester, MA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Trial in HPV Prevention for the U.S. Vietnamese Community
Northwestern University
- Location
- Chicago, IL
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Stand Up 2 HPV: Standing Orders to Improve HPV Vaccination
University of Rochester
- Location
- Rochester, NY
- Eligibility basics
- Ages 9–17
- RecruitingHealthy volunteers
Playing Game to Learn About Children's Vaccine Project
Michigan State University
- Location
- Chandler, AZ
- Eligibility basics
- Ages 11–14
- RecruitingHealthy volunteers
Serologic Response to Pneumococcal Vaccination Among Esophageal Cancer Patients With High Grade Lymphopenia After Chemoradiation
M.D. Anderson Cancer Center
- Location
- Houston, TX
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Empowering Vietnamese Americans
Michigan State University
- Location
- Lansing, MI
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
The INFLUENTIAL Trial- Evaluation of National Inpatient Influenza Vaccination Program
University of Colorado, Denver
- Location
- Chicago, IL + 1 other US site
- Eligibility basics
- Ages 6 mo–99
- RecruitingHealthy volunteersPhase 4
The Role of Neutrophils in the Age-driven Decline in Anti-pneumococcal Vaccine Responses
State University of New York at Buffalo
- Location
- Buffalo, NY
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteers
Understanding Immunity to the Flu Vaccine in COVID-19 Patients
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 9–64
- RecruitingHealthy volunteers
Influenza Immunization in Adults Over Age 75
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 75+
- RecruitingHealthy volunteersPhase 4
Safety of RSV Preventive Monoclonal Antibody
Duke University
- Location
- Oakland, CA + 4 other US sites
- Eligibility basics
- Ages 1 mo–7 mo
- RecruitingHealthy volunteers
Culturally Targeted Health Communication and Receptivity to the Human Papillomavirus Vaccine Among Parents in Flint, MI
Michigan State University
- Location
- Flint, MI
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Dissecting Human Immune Responses to Infection With Influenza or SARS-CoV-2
Washington University School of Medicine
- Location
- St Louis, MO
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
Stories to Prevent (StoP) HPV Cancers
Milton S. Hershey Medical Center
- Location
- Hershey, PA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Hemophilia A Research Program
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Any age listed
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.