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Low dose Strep A Alum

Phase 1

Streptococcal Infections | Monoclonal antibody | Infectious Disease |GSK plc|Last Updated: Aug 11, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment108

FDA Designations

No designations recorded

Clinical trial landscape

Low dose Strep A Alum · 1 trial · 1 indication

Phase 1 1
NCT07085702A Study to Evaluate Safety, Reactogenicity, and Immunogenicity of the GSK 4-component Strep A Vaccine With Aluminum Hydroxide (Alum) or AS37 in Healthy Young AdultsStreptococcal Infections
RECRUITING108 Analytics
PHASE1RECRUITING
A Study to Evaluate Safety, Reactogenicity, and Immunogenicity of the GSK 4-component Strep A Vaccine With Aluminum Hydroxide (Alum) or AS37 in Healthy Young Adults
Streptococcal InfectionsUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with solicited administration site events
Up to 7 days after each study intervention administration occurring at Day 1, Day 31, and Day 121

Solicited administration-site events include pain, redness, and swelling at the administration site.

Number of participants with solicited systemic events
Up to 7 days after each study intervention administration occurring at Day 1, Day 31, and Day 121

Solicited systemic events include fever, headache, myalgia (muscle pain), arthralgia (joint pain), and fatigue (tiredness). Fever is defined as body temperature equal to or above 38.0°C. The preferred location for measuring temperature is the axilla.

Number of participants with unsolicited adverse events (AEs)
Up to 30 days after each study intervention administration occurring at Day 1, Day 31, and Day 121

An unsolicited AE is an AE that was either not included in the list of solicited events or could be included in the list of solicited events but with an onset outside the specified period of follow-up for solicited events. Unsolicited AEs include both serious and nonserious AEs.

Number of participants with laboratory abnormalities
7 days after each study intervention administration at Day 8, Day 38, and Day 128
Number of participants with adverse events of special interest (AESIs)
From Day 1 to Day 301

AESIs include potential immune-mediated disorders (pIMDs) and rheumatic carditis.

Number of participants with serious adverse events (SAEs)
From Day 1 to Day 301

An SAE is defined as any untoward medical occurrence that results in death, is life threatening, requires hospitalization or prolongs existing hospitalization, results in disability/incapacity, abnormal pregnancy outcomes, or other medically significant events.

Number of participants with AEs leading to withdrawal from the study or to discontinuation of study vaccine
From Day 1 to Day 301

Secondary Endpoints

Geometric mean concentrations of immunoglobulin G (IgG) against Streptolysin O (SLO), S. pyogenes Cell Envelope Protease (SpyCEP), S. pyogenes Adhesion and Division protein (SpyAD), and Group A Carbohydrate (GAC), as measured by multiplex immunoassay
Before each study intervention (Day 1, Day 31, and Day 121), 30 days after each study intervention (Day 31, Day 61, and Day 151), and 7 days and 6 months after the third study intervention administration (Days 128 and 301, respectively)
Geometric mean fold increase of IgG against SLO, SpyCEP, SpyAD, and GAC, as measured by multiplex immunoassay
30 days after each study intervention administration compared to before each study intervention administration (Day 31 versus Day 1, Day 61 versus Day 31, and Day 151 versus Day 121) and to before study intervention administration (Day 1)
Number of participants with greater than or equal to (>=) 2-fold and >=4 fold increase in IgG antibody concentration against SLO, SpyCEP, SpyAD, and GAC, as measured by multiplex immunoassay
30 days after each study intervention administration (Day 31, Day 61, and Day 151) compared to before study intervention administration (Day 1)
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Low dose Strep A Alum GroupEXPERIMENTALParticipants randomized to receive 3 doses of Low dose Strep A Alum vaccine on Day 1, Day 31, and Day 121.
Medium dose Strep A Alum GroupEXPERIMENTALParticipants randomized to receive 3 doses of Medium dose Strep A Alum vaccine on Day 1, Day 31, and Day 121.
High dose Strep A Alum GroupEXPERIMENTALParticipants randomized to receive 3 doses of High dose Strep A Alum vaccine on Day 1, Day 31, and Day 121.
Low dose Strep A AS37 GroupEXPERIMENTALParticipants randomized to receive 3 doses of Low dose Strep A AS37 vaccine on Day 1, Day 31, and Day 121.
Medium dose Strep A AS37 GroupEXPERIMENTALParticipants randomized to receive 3 doses of Medium dose Strep A AS37 vaccine on Day 1, Day 31, and Day 121.
High dose Strep A AS37 GroupEXPERIMENTALParticipants randomized to receive 3 doses of High dose Strep A AS37 vaccine on Day 1, Day 31, and Day 121.
Strep A Alum Placebo GroupPLACEBO_COMPARATORParticipants randomized to receive 3 doses of Strep A Alum Placebo on Day 1, Day 31, and Day 121.

Interventions

NameTypeDescription
Low dose Strep A AlumBIOLOGICALLow dose Strep A Alum vaccine will be administered intramuscularly (IM)
Medium dose Strep A AlumBIOLOGICALMedium dose Strep A Alum vaccine will be administered IM
High dose Strep A AlumBIOLOGICALHigh dose Strep A Alum vaccine will be administered IM
Low dose Strep A AS37BIOLOGICALLow dose Strep A AS37 vaccine will be administered IM
Medium dose Strep A AS37BIOLOGICALMedium dose Strep A AS37 vaccine will be administered IM
High dose Strep A AS37BIOLOGICALHigh dose Strep A AS37 vaccine will be administered IM
Strep A Alum PlaceboDRUGStrep A Alum Placebo will be administered IM
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Eligibility Criteria

Age Range18 Years to 25 Years
SexALL
Healthy VolunteersYes
Study Sites2

Inclusion Criteria: * Participants, who, in the opinion of the Investigator, can and will comply with the requirements of the protocol (e.g., completion of electronic diaries \[eDiaries\], return for follow-up visits). * Written or witnessed/thumb-printed informed consent obtained from the particip...

Countries:Australia
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Recent Changes (Last 90 Days)

MEDIUMAug 11, 2026NCT07085702primaryCompletionDate: changed
MEDIUMAug 11, 2026NCT07085702primaryCompletionDate: changed

Frequently asked questions about Low dose Strep A Alum

What is Low dose Strep A Alum used for?

Low dose Strep A Alum is an investigational vaccine being developed for the prevention of Streptococcal Infections. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities. The vaccine is being studied in healthy young adults to evaluate its safety, reactogenicity, and immunogenicity.

Who makes Low dose Strep A Alum?

Low dose Strep A Alum is being developed by GSK plc, a biopharmaceutical company listed on the stock exchange under the ticker symbol GSK. The company is conducting a Phase 1 clinical trial to evaluate the vaccine's safety and immune response in healthy adults.

What phase is Low dose Strep A Alum in?

Low dose Strep A Alum is currently in Phase 1 clinical development. It is an investigational vaccine and has not been approved by regulatory authorities. The ongoing Phase 1 trial is recruiting participants to assess the vaccine's safety, reactogenicity, and immunogenicity in healthy young adults.

What clinical trials is Low dose Strep A Alum in?

Low dose Strep A Alum is being evaluated in a Phase 1 clinical trial with the identifier NCT07085702. This study is titled 'A Study to Evaluate Safety, Reactogenicity, and Immunogenicity of the GSK 4-component Strep A Vaccine With Aluminum Hydroxide (Alum) or AS37 in Healthy Young Adults' and is currently recruiting participants in Australia.

Is Low dose Strep A Alum the same as the GSK 4-component Strep A vaccine?

Low dose Strep A Alum is a formulation of the GSK 4-component Strep A vaccine that uses aluminum hydroxide as an adjuvant. The Phase 1 clinical trial NCT07085702 is evaluating this vaccine with either aluminum hydroxide (Alum) or the AS37 adjuvant system in healthy young adults.