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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Infectious Encephalitis Clear all
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity Study of Venezuelan Equine Encephalomyelitis (VEE) Vaccine as Booster Vaccine in Adults

NCT03531242
View directory record Official record
Conditions
Venezuelan Equine Encephalomyelitis
Interventions
0.5 mL Inactivated, Dried, C-84, TSI-GSD 205, Lot 7, Run 1
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 65 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 15, 2021 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Not applicable Interventional Results available

Precision Diagnosis of Acute Infectious Diseases; Neuroinflammatory Cohort

NCT02910037
View directory record Official record
Conditions
Encephalitis, Meningitis
Interventions
mNGS for pathogen detection
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
1 Minute to 110 Years
Enrollment
214 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
7
States / cities
Davis, California • Los Angeles, California • San Francisco, California + 3 more
Source: ClinicalTrials.gov public record
Updated May 26, 2021 · Synced Sep 22, 2026, 1:05 PM EDT
Completed No phase listed Observational

Safety Surveillance After Immunization With IXIARO

NCT01335412
View directory record Official record
Conditions
Japanese Encephalitis
Interventions
Japanese Encephalitis Virus vaccine, inactivated, adsorbed
Biological
Lead sponsor
Valneva Austria GmbH
Industry
Eligibility
17 Years and older
Enrollment
20,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Alexandria, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 9, 2015 · Synced Sep 22, 2026, 1:05 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity of Venezuelan Equine Encephalomyelitis Vaccine (VEE C-84) as a Booster to VEE TC-83

NCT00582088
View directory record Official record
Conditions
Venezuelan Equine Encephalomyelitis
Interventions
VEE C-84
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 65 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2021
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 10, 2021 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Not applicable Interventional

A Study to Evaluate the Use of Cidofovir (an Experimental Drug) for the Treatment of Progressive Multifocal Leukoencephalopathy (PML) in AIDS Patients

NCT00000945
View directory record Official record
Conditions
HIV Infections, Leukoencephalopathy, Progressive Multifocal
Interventions
Cidofovir, Probenecid
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2001
U.S. locations
19
States / cities
Birmingham, Alabama • San Francisco, California • Denver, Colorado + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2021 · Synced Sep 22, 2026, 1:05 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Control of Leukocyte Function

NCT03027232
View directory record Official record
Conditions
Inflammation, Brain
Interventions
No intervention (drugs) will be given. Purpose: collecting blood for in vitro studies
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 26, 2018 · Synced Sep 22, 2026, 1:05 PM EDT
Completed No phase listed Observational

JC Virus Reactivation in Multiple Sclerosis

NCT02004444
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy, Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 28, 2016 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Vaccination Trial of a Recombinant MVA-BN-WEV Vaccine in Healthy Adult Subjects

NCT04131595
View directory record Official record
Conditions
Equine Encephalitis
Interventions
MVA-BN-WEV Dose 1, MVA-BN-WEV Dose 2, MVA-BN-WEV Dose 3
Biological
Lead sponsor
Bavarian Nordic
Industry
Eligibility
18 Years to 50 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 19, 2020 · Synced Sep 22, 2026, 1:05 PM EDT
Recruiting Phase 2 Interventional

Cytotoxic T Lymphocytes in Treating Patients With Malignancies With BK and/or JC Virus

NCT02479698
View directory record Official record
Conditions
Acquired Immunodeficiency Syndrome, BK Virus Infection, Human Immunodeficiency Virus, JC Virus Infection, Malignant Neoplasm, Merkel Cell Carcinoma, Merkel Cell Polyomavirus Infection, Viral Encephalitis
Interventions
Allogeneic BK-specific Cytotoxic T-lymphocytes, Laboratory Biomarker Analysis
Biological · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of and Immune Response to a West Nile Virus Vaccine (WN/DEN4delta30) in Healthy Adults

NCT00537147
View directory record Official record
Conditions
West Nile Fever
Interventions
WN/DEN4delta30 vaccine, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 2, 2013 · Synced Sep 22, 2026, 1:05 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Venezuelan Equine Encephalitis Monovalent Virus-Like Particle Vaccine

NCT03776994
View directory record Official record
Conditions
Encephalitis, Encephalitis, Viral, Infectious Encephalitis, Virus Diseases, Encephalomyelitis, Venezuelan Equine, Brain Diseases, Central Nervous System Diseases, Central Nervous System Viral Diseases, Alphavirus Infections, Togaviridae Infections, RNA Virus Infections, Central Nervous System Infections, Encephalomyelitis, Physiological Effects of Drugs, Vaccines, Encephalomyelitis, Equine, Nervous System Diseases
Interventions
Vaccinations on Day 0, Day 28, and Day 140
Biological
Lead sponsor
SRI International
Industry
Eligibility
18 Years to 50 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Plymouth, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 22, 2021 · Synced Sep 22, 2026, 1:05 PM EDT
Completed No phase listed Observational

Natural History of West Nile Virus Infection

NCT00069303
View directory record Official record
Conditions
West Nile Virus, Encephalitis, Myelitis
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Not applicable Interventional

A Pilot Study of the Efficacy of Recombinant Alpha Interferon (IFN-A2b) and Zidovudine (AZT) in the Treatment of Progressive Multifocal Leukoencephalopathy (PML) Complicating HIV-1 Infection

NCT00002270
View directory record Official record
Conditions
HIV Infections, Leukoencephalopathy, Progressive Multifocal
Interventions
Interferon alfa-2b, Zidovudine
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Phase 2 Interventional

Safety and Effectiveness of Topotecan HCl to Treat HIV-Infected Patients With AIDS-Related Progressive Multifocal Leukoencephalopathy (PML)

NCT00002395
View directory record Official record
Conditions
HIV Infections, Leukoencephalopathy, Progressive Multifocal
Interventions
Topotecan
Drug
Lead sponsor
SmithKline Beecham
Industry
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
5
States / cities
Los Angeles, California • San Francisco, California • Miami, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Not applicable Interventional

A Randomized Prospective Study of Pyrimethamine Therapy for Prevention of Toxoplasmic Encephalitis in HIV-Infected Individuals With Serologic Evidence of Latent Toxoplasma Gondii Infection

NCT00000666
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Pyrimethamine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1992
U.S. locations
16
States / cities
San Francisco, California • Denver, Colorado • New Haven, Connecticut + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2012 · Synced Sep 22, 2026, 1:05 PM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

SV2A & TSPO PET Imaging Measures to Reveal Mechanisms of HIV Neuropathogenesis During Antiretroviral Therapy

NCT05586581
View directory record Official record
Conditions
HIV Associated Neurocognitive Disorder, HIV Dementia, HIV Encephalitis, Healthy
Interventions
SV2A PET, TSPO PET
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 80 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2030
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 17, 2026 · Synced Sep 22, 2026, 1:05 PM EDT
Completed No phase listed Observational

Tysabri Observational Cohort Study - Multiple Sclerosis (MS) Registries

NCT03399981
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
Tysabri
Biological
Lead sponsor
Biogen
Industry
Eligibility
Not listed
Enrollment
80,327 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Phase 3 Interventional Results available

Long Term Treatment of Herpes Simplex Encephalitis (HSE) With Valacyclovir

NCT00031486
View directory record Official record
Conditions
Encephalitis
Interventions
Valacyclovir, Placebo
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
12 Years and older
Enrollment
91 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2011
U.S. locations
13
States / cities
Birmingham, Alabama • Phoenix, Arizona • Sacramento, California + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2012 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of ChimeriVax-WN02 West Nile Vaccine in Healthy Adults

NCT00442169
View directory record Official record
Conditions
West Nile Fever
Interventions
ChimeriVax-WN02 Low Dose, ChimeriVax-WN02 Medium Dose, ChimeriVax-WN02 High Dose, 0.9% Saline solution, 0.9 % NaCl solution
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
5
States / cities
Phoenix, Arizona • Idaho Falls, Idaho • Lenexa, Kansas + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Sep 22, 2026, 1:05 PM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

A Phase 1 Study Evaluating the Safety, Tolerability, and Immunogenicity of V4020 Vaccine in Healthy Volunteers

NCT07088822
View directory record Official record
Conditions
Venezuelan Equine Encephalitis, Venezuelan Equine Encephalitis Virus Infection
Interventions
V4020
Biological
Lead sponsor
Medigen, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 27, 2025 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Early Phase 1 Interventional

Adoptive Cellular Immunotherapy for Progressive Multifocal Leukoencephalopathy With Ex Vivo Generated Polyomavirus-Specific T-Cells

NCT02694783
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
PyVST
Biological
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 22, 2026, 1:05 PM EDT
Recruiting Phase 1 Interventional

Central Nervous System Uptake of Anti-CD8+ T Cell Minibodies in Multiple Sclerosis and Progressive Multifocal Leukoencephalopathy

NCT05849467
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy, Multiple Sclerosis, Other Neuroinflammatory Diseases With BBB Leakage
Interventions
89 Zr-Df-crefmirlimab
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 120 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Sep 22, 2026, 1:05 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety Study of ChimeriVax™-JE Vaccine to Prevent Japanese Encephalitis.

NCT00314132
View directory record Official record
Conditions
Encephalitis, Japanese Encephalitis
Interventions
ChimeriVax-JE, Japanese Encephalitis vaccine, 0.9% Saline
Biological
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Enrollment
2,004 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
16
States / cities
Burbank, California • Costa Mesa, California • Davis, California + 13 more
Source: ClinicalTrials.gov public record
Updated Dec 5, 2012 · Synced Sep 22, 2026, 1:05 PM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

A Phase 2 Trial in Healthy Adult Participants of the Recombinant MVA-BN-WEV Vaccine

NCT06899802
View directory record Official record
Conditions
Encephalitis
Interventions
MVA-BN-WEV, Placebo
Biological · Other
Lead sponsor
Bavarian Nordic
Industry
Eligibility
18 Years to 50 Years
Enrollment
411 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
9
States / cities
Sacramento, California • Lilburn, Georgia • Lenexa, Kansas + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Sep 22, 2026, 1:05 PM EDT