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Showing 1–24 of 43 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Pneumonia, Pneumococcal Clear all
Completed Phase 3 Interventional Results available

Comparative Study of Ceftaroline vs. Ceftriaxone in Adults With Community-Acquired Pneumonia

NCT00509106
View directory record Official record
Conditions
Bacterial Pneumonia
Interventions
Ceftaroline fosamil for Injection, Ceftriaxone, Placebo
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
622 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 13, 2017 · Synced Jul 21, 2026, 6:07 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Safety, Tolerability, and Immunogenicity of VAX-31 in Adults ≥50 Years With Prior Pneumococcal Vaccination

NCT07425392
View directory record Official record
Conditions
Pneumococcal Vaccines
Interventions
31-valent pneumococcal conjugate vaccine, PCV20
Biological
Lead sponsor
Vaxcyte, Inc.
Industry
Eligibility
50 Years and older
Enrollment
752 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
30
States / cities
Chinle, Arizona • Phoenix, Arizona • Whiteriver, Arizona + 27 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of Azithromycin on MAC Disease Prevention in HIV-Positive Patients

NCT00000947
View directory record Official record
Conditions
Mycobacterium Avium-intracellulare Infection, HIV Infections
Interventions
Azithromycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2000
U.S. locations
19
States / cities
San Francisco, California • Denver, Colorado • Washington D.C., District of Columbia + 11 more
Source: ClinicalTrials.gov public record
Updated Nov 2, 2021 · Synced Jul 21, 2026, 6:07 PM EDT
Active, not recruiting No phase listed Observational

A Study to Learn About How Well the Prevnar 20 Vaccine Works for Pneumonia in People Who Are 65 Years and Older

NCT06782282
View directory record Official record
Conditions
Community-Acquired Pneumonia (CAP)
Interventions
Not listed
Lead sponsor
Pfizer
Industry
Eligibility
65 Years and older
Enrollment
22,234,435 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Aerosolized and Intravenous Colistin in Healthy Adults

NCT01863719
View directory record Official record
Conditions
Pathogen Resistance, Pneumococcal Infection, Pneumonia
Interventions
Colistimethate sodium
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
2
States / cities
Baltimore, Maryland • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 1, 2020 · Synced Jul 21, 2026, 6:07 PM EDT
Completed No phase listed Observational

Epidemiologic Study Of The Distribution Of Vaccine-Type Streptococcus Pneumoniae Serotypes In Adults In The US With Community-Acquired Pneumonia

NCT01086397
View directory record Official record
Conditions
Pneumonia, Pneumococcal, Vaccines, Pneumococcal
Interventions
Urine sample collection
Procedure
Lead sponsor
Pfizer
Industry
Eligibility
50 Years and older
Enrollment
782 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
14
States / cities
Mobile, Alabama • La Mesa, California • Tampa, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Mar 14, 2012 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Phase 2 Study to Evaluate the Safety, Tolerability, and Immune Response of AFX3772 Vaccine in Healthy Infants

NCT05412030
View directory record Official record
Conditions
Pneumonia, Bacterial, Pneumococcal Infections, Pneumonia, Pneumococcal
Interventions
AFX3772, Prevnar 13, Prevnar 20
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
42 Days to 90 Days
Enrollment
388 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
42
States / cities
Jonesboro, Arkansas • Los Angeles, California • Miami, Florida + 35 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Jul 21, 2026, 6:07 PM EDT
Completed No phase listed Observational

A Study To Examine Serologic Response In Hospitalized Patients Receiving Polyvalent Pneumococcal Vaccine

NCT00955851
View directory record Official record
Conditions
Pneumonia
Interventions
Pre and post vaccination titers
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jul 29, 2010 · Synced Jul 21, 2026, 6:07 PM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

A Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of VAX-31 in Healthy Infants

NCT06720038
View directory record Official record
Conditions
Pneumococcal Vaccines
Interventions
0.5 mL of the low dose VAX-31, 0.5 mL of the mid dose VAX-31, 0.5 mL of the high dose VAX-31, 0.5 mL dose of PCV20, 0.5 mL of the High-PFS dose VAX-31
Biological
Lead sponsor
Vaxcyte, Inc.
Industry
Eligibility
42 Days to 89 Days
Enrollment
900 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
45
States / cities
Jonesboro, Arkansas • Gardena, California • Los Angeles, California + 32 more
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Safety, Tolerability, and Immunogenicity of VAX-31 in Adults ≥50 Years With Immunobridging to Adults 18-49

NCT07284654
View directory record Official record
Conditions
Pneumococcal Vaccines
Interventions
31 valent pneumococcal conjugate vaccine, PCV20, PCV21
Biological
Lead sponsor
Vaxcyte, Inc.
Industry
Eligibility
18 Years and older
Enrollment
4,049 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
30
States / cities
Birmingham, Alabama • Chinle, Arizona • Whiteriver, Arizona + 27 more
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Improving Pneumococcal Vaccination Rates in an Ambulatory Pre-surgical Testing Setting

NCT01787838
View directory record Official record
Conditions
Community Acquired Pneumonia
Interventions
Focused Health Education
Other
Lead sponsor
Carilion Clinic
Other
Eligibility
18 Years to 110 Years
Enrollment
2,509 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 18, 2017 · Synced Jul 21, 2026, 6:07 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

A Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of VAX-31 With Influenza Vaccine in Adults ≥ 50 Years of Age

NCT07365826
View directory record Official record
Conditions
Pneumococcal Vaccines
Interventions
31-valent pneumococcal conjugate vaccine, Seasonal Influenza Vaccine (SIV) (Flublok), Placebo
Biological
Lead sponsor
Vaxcyte, Inc.
Industry
Eligibility
50 Years and older
Enrollment
1,390 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
25
States / cities
Phoenix, Arizona • Fort Collins, Colorado • DeLand, Florida + 22 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Recruiting Phase 2 Interventional

Pneumococcal Pneumonia Vaccine Series (PCV20 and PPSV23) in Patients With Chronic Lymphocytic Leukemia Associated Immunodeficiency, PROTECT CLL Trial

NCT05183854
View directory record Official record
Conditions
Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma
Interventions
Pneumococcal 20-valent Conjugate Vaccine, Pneumococcal Polyvalent Vaccine
Biological
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Completed No phase listed Observational Results available

A Study To Learn About The Effects Of Pneumococcal Vaccine In People With HIV

NCT05794191
View directory record Official record
Conditions
HIV, Pneumonia, Infections, Pneumococcal
Interventions
Vaccine Administration
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
350,399 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 19, 2025 · Synced Jul 21, 2026, 6:07 PM EDT
Active, not recruiting No phase listed Observational

A Study to Learn How Effective is PCV20 to Help Stop Adults Who Have a Higher Chance of Getting Pneumonia

NCT07251465
View directory record Official record
Conditions
Pneumonia
Interventions
Receipt of PCV20
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
846,279 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Phase 4 Interventional Results available

Pneumococcal Vaccines in Patients With Asthma

NCT03260790
View directory record Official record
Conditions
Asthma
Interventions
PCV13, PPSV23
Biological
Lead sponsor
Mayo Clinic
Other
Eligibility
19 Years to 64 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pharmacist Impact on Pneumococcal Polysaccharide Vaccination Rates in Patients With Diabetes in a Supermarket Pharmacy Chain

NCT03851978
View directory record Official record
Conditions
Pneumococcal Pneumonia
Interventions
Pharmacist Vaccine Education
Behavioral
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
19 Years to 64 Years
Enrollment
431 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
4
States / cities
Midlothian, Virginia • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 14, 2019 · Synced Jul 21, 2026, 6:07 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate Tolerability, Safety and Immunogenicity of MVX01 Pneumococcal Vaccine

NCT06337643
View directory record Official record
Conditions
Pneumococcal Vaccine
Interventions
MVX01, MVX01 Placebo
Biological
Lead sponsor
Matrivax Research and Development Corporation
Industry
Eligibility
18 Years to 75 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
Savannah, Georgia • Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 28, 2024 · Synced Jul 21, 2026, 6:07 PM EDT
Completed No phase listed Observational

Etiology of Community Acquired Pneumonia

NCT00471757
View directory record Official record
Conditions
Streptococcus Pneumonia, Haemophilus Influencae, Mycoplasma Pneumonia, Chlamydia Pneumonia
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 12, 2018 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Text Message-Based Nudges Prior to Primary Care Visits to Increase Care Gap Closure

NCT05799976
View directory record Official record
Conditions
Pneumonia, Pneumococcal, Diabetes Mellitus, Breast Cancer, Colorectal Cancer
Interventions
Text message nudge
Behavioral
Lead sponsor
Mitesh Patel
Industry
Eligibility
18 Years and older
Enrollment
29,334 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Recombinant Attenuated Salmonella Typhi Vaccine Vectors Producing Streptococcus Pneumoniae PspA

NCT01033409
View directory record Official record
Conditions
Pneumonia
Interventions
Salmonella Typhi-vectored pneumonia vaccine
Biological
Lead sponsor
Arizona State University
Other
Eligibility
18 Years to 40 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 1, 2011 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Modulation of Steroid Immunosuppression by Alveolar Efferocytosis

NCT03034642
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive, Pneumonia, Bacterial
Interventions
Bronchoscopy with bilateral bronchoalveolar lavages
Procedure
Lead sponsor
VA Ann Arbor Healthcare System
Federal
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 2, 2022 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effectiveness of the Pneumococcal Polysaccharide Vaccine in Military Recruits

NCT02079701
View directory record Official record
Conditions
Pneumonia, Acute Respiratory Disease
Interventions
23-valent pneumococcal vaccine, Placebo
Biological
Lead sponsor
Naval Health Research Center
Federal
Eligibility
Not listed
Enrollment
152,723 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2007
U.S. locations
5
States / cities
San Diego, California • Great Lakes, Illinois • Fort Leonard Wood, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 5, 2014 · Synced Jul 21, 2026, 6:07 PM EDT
Completed Phase 3 Interventional

New Antibiotic to Treat Patients With Community-acquired Pneumonia Due to a Specific Bacteria (S. Pneumoniae Pneumonia)

NCT00035269
View directory record Official record
Conditions
Pneumonia, Pneumococcal, Community Acquired Infections, Gram-positive Bacterial Infections
Interventions
Antibiotic
Drug
Lead sponsor
Pfizer
Industry
Eligibility
13 Years and older
Enrollment
230 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
34
States / cities
Los Angeles, California • Jacksonville, Florida • Naples, Florida + 29 more
Source: ClinicalTrials.gov public record
Updated Apr 25, 2011 · Synced Jul 21, 2026, 6:07 PM EDT