Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 9, 2026, 5:36 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 66 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Challenge Strain Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Human Challenge Model Refinement With Enterotoxigenic Escherichia Coli Strain B7A

NCT02773446
View directory record Official record
Conditions
Healthy Volunteer
Interventions
ETEC strain B7A (O148:H28 CS6+ LT+ST+) (Lot 0481) in Buffer
Biological
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years to 50 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 5, 2018 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Pre-Study of Wild Type Enterotoxigenic E. Coli (ETEC) Strain for Verification of a Planned Challenge Dose

NCT06290089
View directory record Official record
Conditions
ETEC Diarrhea
Interventions
Enterotoxigenic E. coli (ETEC) strain
Other
Lead sponsor
Scandinavian Biopharma AB
Industry
Eligibility
18 Years to 50 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 17, 2025 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Safety and Preliminary Efficacy of the Malaria Vaccine Candidates Falciparum Merozoite Protein-1 (FMP1) and SmithKlineBeecham (SKBB) Candidate Malaria Vaccine RTS,S

NCT01556945
View directory record Official record
Conditions
Malaria, Falciparum
Interventions
FMP1/AS02, RTS,S/AS02, AS02 adjuvant alone, Malaria challenge
Biological · Other
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 45 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2001
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated May 1, 2014 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Assessment of a Dengue-1-Virus-Live Virus Human Challenge - (DENV-1-LVHC) Virus Strain

NCT02372175
View directory record Official record
Conditions
Dengue
Interventions
Dengue-1 Virus-Live Virus Human Challenge (DENV-1-LVHC)
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 45 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Jul 14, 2019 · Synced Sep 9, 2026, 5:36 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Influenza Human Challenge Model

NCT05332899
View directory record Official record
Conditions
Influenza
Interventions
Influenza Virus Type A H3N2 Challenge
Biological
Lead sponsor
Emory University
Other
Eligibility
18 Years to 49 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study Confirming A Human Challenge Model and Investigating The Safety Of VLA1701

NCT03576183
View directory record Official record
Conditions
Enterotoxigenic Escherichia Coli Infection, Diarrhea
Interventions
VLA1701, Placebo, Challenge Strain
Biological · Other
Lead sponsor
Valneva Austria GmbH
Industry
Eligibility
18 Years to 49 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 22, 2021 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

RSV Challenge in Healthy Adults

NCT00100373
View directory record Official record
Conditions
Respiratory Infections, Acute, Respiratory Syncytial Virus
Interventions
RSV challenge material
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
21 Years to 40 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2005
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 26, 2010 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy of Bovine Milk Immunoglobulin Against CS17 and CsbD

NCT00524004
View directory record Official record
Conditions
Travelers' Diarrhea
Interventions
Anti-CsbD Bovine IgG, Placebo, Anti-CS17 Bovin IgG
Biological · Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years to 45 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Sep 9, 2026, 5:36 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Campylobacter Jejuni Challenge Model Development: Assessment of Homologous Protection

NCT01048112
View directory record Official record
Conditions
Campylobacter Infections
Interventions
Campylobacter jejuni strain CG8421
Biological
Lead sponsor
University of Vermont
Other
Eligibility
18 Years to 50 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
2
States / cities
Silver Spring, Maryland • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Jan 12, 2010 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety, Tolerability and Efficacy of PfSPZ Vaccine Against Heterologous CHMI in US Malaria naïve Adults

NCT04966871
View directory record Official record
Conditions
Malaria
Interventions
PfSPZ Vaccine, PfSPZ Challenge (7G8) for CHMI, Normal Saline
Biological · Other
Lead sponsor
Sanaria Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 17, 2022 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Cholera Anti-Secretory Treatment Trial

NCT04150250
View directory record Official record
Conditions
Cholera
Interventions
iOWH032, Placebo, V. cholerae Challenge, Antibiotics
Drug · Other
Lead sponsor
PATH
Other
Eligibility
18 Years to 44 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 24, 2021 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Experimental Human Infection With Neisseria Gonorrhoeae

NCT03840811
View directory record Official record
Conditions
Gonococcal Infection
Interventions
Cefixime, Ceftriaxone, Ciprofloxacin, Neisseria gonorrhoeae strain FA1090 A26, Neisseria gonorrhoeae strain FA7537
Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 36 Years · Male only
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 22, 2021 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Efficacy of Anti-CFA/I and CfaE Bovine Milk Immunoglobulin Against Challenge With H10407 ETEC Expressing CFA/I

NCT00435526
View directory record Official record
Conditions
Diarrhea
Interventions
anti-CFA/I bovine IgG, and anti-CfaE bovine IgG
Biological
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years to 45 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 14, 2007 · Synced Sep 9, 2026, 5:36 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

A Phase 1 Trial of PfSPZ Vaccine in Healthy Adults to Determine Safety, Tolerability and Efficacy Against Heterologous CHMI

NCT05604521
View directory record Official record
Conditions
Malaria, Malaria,Falciparum
Interventions
PfSPZ Vaccine, PfSPZ Challenge (7G8), Normal Saline
Biological · Other
Lead sponsor
Sanaria Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 24, 2024 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy Study of a Vaccine Against Enterotoxigenic Escherichia Coli (ETEC) to Prevent Moderate to Severe Diarrhea

NCT01060748
View directory record Official record
Conditions
Diarrhea
Interventions
ACE527, Placebo
Biological
Lead sponsor
TD Vaccines A/S
Industry
Eligibility
18 Years to 50 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 6, 2011 · Synced Sep 9, 2026, 5:36 AM 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 9, 2026, 5:36 AM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

Malaria CVD 36000; Gates INV090205

NCT07558122
View directory record Official record
Conditions
Malaria (Plasmodium Falciparum)
Interventions
PfSPZ Challenge (NF54), Wearable Biosensor Devices, Placebo
Biological · Device · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 50 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Sep 9, 2026, 5:36 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Intradermal Fractional Dose IPV (fIPV) in Combination With dmLT

NCT05327426
View directory record Official record
Conditions
Poliomyelitis
Interventions
Intradermal fractional dose inactivated polio vaccine (fIPV) in combination with recombinant double mutant heat labile toxin, LT(R192G/L211A), (dmLT), Intradermal fractional dose inactivated polio vaccine (fIPV), Monovalent oral poliomyelitis vaccine (mOPV), Sabin strain
Biological
Lead sponsor
University of Vermont
Other
Eligibility
18 Years to 45 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Nov 28, 2023 · Synced Sep 9, 2026, 5:36 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy Challenge Study of CVD 1208S, a Live, Attenuated Oral Vaccine to Prevent Shigella: Phase IIb

NCT00866242
View directory record Official record
Conditions
Shigella
Interventions
CVD 1208S, Challenge strain of wild-type Shigella flexneri 2a
Biological
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Controlled Human Infection Model Challenge/Rechallenge

NCT04992520
View directory record Official record
Conditions
Shigellosis
Interventions
Shigella sonnei 53G, Shigella flexneri 2a 2457T
Biological
Lead sponsor
PATH
Other
Eligibility
18 Years to 50 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 30, 2025 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Efficacy Study of IM Administered CssBA+dmLT Against Moderate-severe Diarrhea in Human Infection Model With ETEC Strain B7A in Healthy Adults

NCT06692907
View directory record Official record
Conditions
Escherichia Infection
Interventions
B7A (ETEC challenge strain), CssBA, dmLT, Placebo
Other · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
2
States / cities
Baltimore, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety Study of a Human Metapneumovirus Challenge Virus in Healthy Adults

NCT01109329
View directory record Official record
Conditions
Human Metapneumovirus
Interventions
HMPV challenge virus
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 2, 2013 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Not applicable Interventional

Comparing Behavior Therapy and Yoga for Treating Depression Among Adults

NCT05546697
View directory record Official record
Conditions
Depression
Interventions
Online- Yoga-based Intervetion, Online- BA
Other · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
520 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Sep 9, 2026, 5:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Challenge Model for Assessment of Human TB Immunity

NCT01868464
View directory record Official record
Conditions
Tuberculosis
Interventions
BCG TICE strain
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
2
States / cities
Decatur, Georgia • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 9, 2026, 5:36 AM EDT