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A Study to Evaluate the Safety and Immunogenicity of RSVpreF Coadministered With Herpes Zoster Vaccine in Adults

A PHASE 3, MULTICENTER, PARALLEL-GROUP, OPEN-LABEL STUDY TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF RESPIRATORY SYNCYTIAL VIRUS PREFUSION F SUBUNIT VACCINE WHEN COADMINISTERED WITH HERPES ZOSTER SUBUNIT VACCINE IN ADULTS ≥50 YEARS OF AGE

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06890416
Acronym
PISSARRO
Enrollment
526
Registered
2025-03-24
Start date
2025-04-04
Completion date
2025-09-30
Last updated
2025-11-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Respiratory Syncytial Virus (RSV)

Keywords

RSV, Vaccine

Brief summary

This purpose of this phase 3 multicenter, parallel-group, open-label study is to learn about the safety, tolerability, and immunogenicity of RSVpreF and HZ/su vaccine when given together in adults 50 years of age and older.

Interventions

BIOLOGICALRESPIRATORY SYNCYTIAL VIRUS PREFUSION F SUBUNIT VACCINE

Intramuscular injection

BIOLOGICALHZ/su VACCINE

intramuscular injection

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
50 Years to No maximum
Healthy volunteers
Yes

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-confirmed HZ within the past 12 months. * Prior history of any subtype of Guillain Barré syndrome of any etiology. * Serious chronic disorder, including metastatic malignancy, end-stage renal disease with or without dialysis, clinically unstable cardiac disease, or any other disorder that, in the investigator's opinion, excludes the participant from participating in the study. * Immunocompromised individuals with known or suspected immunodeficiency, as determined by history and/or laboratory/physical examination, and medication list * Previous vaccination with any licensed or investigational RSV vaccine at any time prior to enrollment, or planned receipt of a nonstudy RSV vaccine during study participation. * Previous vaccination with any licensed recombinant adjuvant zoster vaccine (Shingrix) at any time prior to enrollment, or planned receipt of a nonstudy licensed VZV vaccine (Shingrix) during study participation. * History of previous vaccination with live HZ vaccine (Zostavax) in the last 2 years from enrollment, or planned receipt through study participation. * Previous vaccination with any investigational VZV vaccine at any time prior to enrollment, or planned receipt of a nonstudy investigational VZV vaccine during study participation. * Individuals who receive chronic systemic treatment with immunosuppressive therapy, including cytotoxic agents, immunosuppressive monoclonal antibodies, systemic corticosteroids (defined as ≥20 mg/day of prednisone or equivalent for ≥14 days), eg, for cancer or an autoimmune disease, or radiotherapy, from 60 days before study intervention administration, or planned receipt throughout the study.

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants with Serious Adverse Events (SAEs) Throughout the StudyWithin 4 Months after first study vaccination (Vaccination on Day 1)Describe SAEs occurring through 4 months after the first study intervention administration.
Geometric Mean Ratio (GMR) of Neutralizing Titer (NTs) for RSV A and B in RSVpreF + herpes zoster subunit vaccine (HZ/su) Compared to RSVpreF Alone1 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 Alone1 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 VaccinationWithin 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 VaccinationWithin 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 VaccinationWithin 1 Month after last vaccinationDescribe AEs occurring through 1 month after each study intervention administration

Secondary

MeasureTime frame
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 rate1 month after vaccination with RSVpreF
Anti-gE antibody concentrations expressed as GMCsBefore vaccination and 1 month after the second dose of HZ/su
Anti-gE antibody concentrations expressed as GMFRsBefore vaccination and 1 month after the second dose of HZ/su
Anti-gE antibody concentrations expressed as seroresponse rate1 month after the second dose of HZ/su

Countries

Puerto Rico, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026