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HZ/su VACCINE

Phase 3

Respiratory Syncytial Virus (RSV) | Monoclonal antibody | Infectious Disease |Pfizer, Inc.|Last Updated: Nov 6, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment526

FDA Designations

No designations recorded

Clinical trial landscape

HZ/su VACCINE · 1 trial · 1 indication

Phase 3 1
NCT06890416A Study to Evaluate the Safety and Immunogenicity of RSVpreF Coadministered With Herpes Zoster Vaccine in AdultsRespiratory Syncytial Virus (RSV)
COMPLETED526 Analytics
PHASE3COMPLETED
A Study to Evaluate the Safety and Immunogenicity of RSVpreF Coadministered With Herpes Zoster Vaccine in Adults
Respiratory Syncytial Virus (RSV)Unlock trial analytics

Study Endpoints

Primary Endpoints

Geometric Mean Ratio (GMR) of Neutralizing Titer (NTs) for RSV A and B in RSVpreF + herpes zoster subunit vaccine (HZ/su) Compared to RSVpreF Alone
1 month after vaccination with RSVpreF in the RSVpreF + HZ/su coadministration group to RSVpreF alone in the sequential administration group
Anti-gE antibody concentrations expressed as Geometric Mean Concentration (GMC) ratios in RSVpreF + HZ/su Compared to HZ/su Alone
1 month after the second dose of HZ/su in the RSVpreF + HZ/su coadministration group to HZ/su alone in the sequential administration group
Percentage of Participants reporting Local Reactions Within 7 Days after Vaccination
Within 7 Days after each vaccination (Vaccination on Day 1)

Describe local reactions (redness, swelling, and pain at the injection site) within 7 days following each study intervention administration recorded by participants in an electronic diary (e-diary).

Percentage of Participants with Systemic Events Within 7 Days after Vaccination
Within 7 Days after each vaccination (Vaccination on Day 1)

Describe systemic events (fatigue, headache, vomiting, nausea, diarrhea, muscle pain, and joint pain) within 7 days following each study intervention administration recorded by participants in an electronic diary (e-diary).

Percentage of Participants with Adverse Events (AEs)from Vaccination through 1 Month after Vaccination
Within 1 Month after last vaccination

Describe AEs occurring through 1 month after each study intervention administration

Percentage of Participants with Serious Adverse Events (SAEs) Throughout the Study
Within 4 Months after first study vaccination (Vaccination on Day 1)

Describe SAEs occurring through 4 months after the first study intervention administration.

Secondary Endpoints

NTs for RSV A and RSV B expressed as Geometric Mean Titers (GMT)
Before vaccination with RSVpreF, 1 month after vaccination with RSVpreF
NTs for RSV A and RSV B expressed as Geometric Mean Fold Rise (GMFR)
Before vaccination and 1 month after vaccination with RSVpreF
NTs for RSV A and RSV B expressed as seroresponse rate
1 month after vaccination with RSVpreF
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Coadministration GroupOTHER* Visit 1 (Day 1): RSVpreF + HZ/su dose 1 * Visit 3 (Month 2): HZ/su dose 2
Sequential Administration GroupOTHER* Visit 1 (Day 1): HZ/su dose 1 * Visit 2 (Month 1): RSVpreF * Visit 3 (Month 2): HZ/su dose 2

Interventions

NameTypeDescription
RESPIRATORY SYNCYTIAL VIRUS PREFUSION F SUBUNIT VACCINEBIOLOGICALIntramuscular injection
HZ/su VACCINEBIOLOGICALintramuscular injection
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Eligibility Criteria

Age Range50 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites26

Inclusion Criteria • Male and female participants 50 years of age and older who are healthy or with stable chronic medical conditions Exclusion Criteria * Current clinically suspected or polymerase chain reaction (PCR)-confirmed ongoing episode of HZ and/or history of clinically suspected or PCR-...

Countries:United StatesPuerto Rico
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Frequently asked questions about HZ/su VACCINE

What is HZ/su VACCINE used for?

HZ/su VACCINE is an investigational vaccine being studied for use in adults to prevent Respiratory Syncytial Virus (RSV). It is a monoclonal antibody modality and is currently in Phase 3 clinical development. The vaccine is being evaluated for safety and immunogenicity when coadministered with a herpes zoster vaccine.

Who makes HZ/su VACCINE?

HZ/su VACCINE is being developed by Pfizer, Inc., a biopharmaceutical company traded on the New York Stock Exchange under the ticker symbol PFE. The company is conducting clinical trials to evaluate the vaccine's safety and immunogenicity in adult populations.

What phase is HZ/su VACCINE in?

HZ/su VACCINE is in Phase 3 clinical development. It is an investigational vaccine and has not been approved by regulatory authorities. A Phase 3 clinical trial has been completed to evaluate its safety and immunogenicity when coadministered with a herpes zoster vaccine in adults.

What clinical trials is HZ/su VACCINE in?

HZ/su VACCINE has one completed Phase 3 clinical trial registered under NCT06890416. The study evaluated the safety and immunogenicity of RSVpreF coadministered with a herpes zoster vaccine in adults aged 50 years and older. The trial enrolled 526 participants in the United States and Puerto Rico.

Is HZ/su VACCINE the same as RSVpreF?

HZ/su VACCINE is associated with the investigational vaccine candidate RSVpreF, which is being studied for the prevention of Respiratory Syncytial Virus (RSV). The Phase 3 clinical trial NCT06890416 evaluates RSVpreF coadministered with a herpes zoster vaccine, and HZ/su VACCINE refers to this vaccine candidate.