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XBB.1.5 Vaccine

Phase 2

COVID-19 | Monoclonal antibody | Infectious Disease |Novavax, Inc.|Last Updated: May 30, 2024

Success Probability

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Trial Design

RandomizedACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment660

FDA Designations

No designations recorded

Clinical trial landscape

XBB.1.5 Vaccine · 1 trial · 1 indication

Phase 2 1
NCT05975060A Study to Evaluate the Safety and Immunogenicity of an (Omicron Subvariant) COVID-19 Vaccine Booster Dose in Previously Vaccinated Participants and Unvaccinated Participants.COVID-19
COMPLETED660 Analytics
PHASE2COMPLETED
A Study to Evaluate the Safety and Immunogenicity of an (Omicron Subvariant) COVID-19 Vaccine Booster Dose in Previously Vaccinated Participants and Unvaccinated Participants.
COVID-19Unlock trial analytics

Study Endpoints

Primary Endpoints

Part 1: Pseudovirus neutralization (inhibitory dilution at a concentration of 50%; ID 50 ) to the NVX-CoV2601 vaccine
Day 28

Pseudovirus neutralization (inhibitory dilution at a concentration of 50%; ID 50 ) to the NVX-CoV2601 vaccine assessed at Day 28 following study vaccination.

Part 1: Seroresponse Rates (SRRs) in ID 50 titers to the NVXCoV2601 vaccine
Day 28

SRRs (proportion of seroconverted participants) in ID 50 titers to the NVXCoV2601 vaccine assessed at Day 28 following the study vaccination.

Part 2: SRRs in ID 50 titers to the XBB.1.5 Omicron subvariant
Day 28

SRRs (proportion of seroconverted participants) in ID 50 titers to the XBB.1.5 Omicron subvariant assessed at Day 28 following study vaccination.

Part 2: ID 50 (Geometric Mean Titers) GMTs to the XBB.1.5 Omicron subvariant
Day 28

ID 50 GMTs to the XBB.1.5 Omicron subvariant assessed at Day 28 following study vaccination.

Secondary Endpoints

Part 1: Pseudovirus neutralization (inhibitory dilution at a concentration of 50%; ID50) to the NVX-CoV2601 vaccine
Day 28
Part 1: ID 50 GMTs to the XBB.1.5 Omicron subvariant
Day 0 to Day 180
Part 1: ID 50 geometric mean fold rise (GMFR) to the XBB.1.5 Omicron subvariant at relevant time points (Days 28 and 180) from baseline (Day 0).
Day 0 to Day 180
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group-A XBB.1.5 Vaccine (Booster)EXPERIMENTALThe Monovalent \[5 μg/50 μg\] NVX-CoV2601 XBB.1.5 Vaccine (Booster)
Group-B The monovalent XBB.1.5 Vaccine (Single Dose).ACTIVE_COMPARATORGroup-B The monovalent \[5 μg/50 μg\] NVX-CoV2601 XBB.1.5 Vaccine (Single Dose).

Interventions

NameTypeDescription
XBB.1.5 Vaccine (Booster)BIOLOGICALOmicron sub variant XBB.1.5 SARS-CoV-2 rS /Matrix-M Adjuvant the monovalent \[5 μg/50 μg\] NVX-CoV2601) XBB.1.5 Vaccine (Booster)
XBB.1.5 Vaccine (single dose)BIOLOGICALOmicron sub variant XBB.1.5 SARS-CoV-2 rS /Matrix-M Adjuvant the monovalent \[5 μg/50 μg\] NVX-CoV2601) XBB.1.5 Vaccine ( single dose)
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Eligibility Criteria

Age Range18 Years to 54 Years
SexALL
Healthy VolunteersNo
Study Sites30

Inclusion Criteria: 1. Adults ≥ 18 years of age at time of study vaccination. 2. Part 1: Previously vaccinated with ≥ 3 doses of the Moderna and/or Pfizer /BioNTech prototype monovalent and/or BA.4/5 containing bivalent COVID-19 vaccines with the last dose administered ≥ 90 days prior to study vacc...

Countries:United States
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Frequently asked questions about XBB.1.5 Vaccine

What is XBB.1.5 Vaccine used for in COVID-19?

XBB.1.5 Vaccine is an investigational COVID-19 vaccine being developed by Novavax, Inc. (NVAX) for the prevention of COVID-19. It is designed as a booster dose to be given to previously vaccinated individuals and also evaluated in unvaccinated participants. The vaccine is currently in Phase 2 clinical development.

Who makes XBB.1.5 Vaccine?

XBB.1.5 Vaccine is being developed by Novavax, Inc., a biotechnology company traded on the NASDAQ under the ticker symbol NVAX. The company is conducting clinical trials to evaluate the safety and immunogenicity of this COVID-19 vaccine candidate.

What phase is XBB.1.5 Vaccine in?

XBB.1.5 Vaccine is in Phase 2 clinical development. It is an investigational vaccine and has not been approved by regulatory authorities. The Phase 2 trial has been completed, and the vaccine is being studied as a booster dose for COVID-19.

What clinical trials is XBB.1.5 Vaccine in?

XBB.1.5 Vaccine has been studied in one completed Phase 2 clinical trial with the identifier NCT05975060. This trial evaluated the safety and immunogenicity of the vaccine as a booster dose in previously vaccinated participants and in unvaccinated participants. The trial enrolled 660 participants in the United States.

Is XBB.1.5 Vaccine the same as a Novavax COVID-19 vaccine?

XBB.1.5 Vaccine is a COVID-19 vaccine candidate developed by Novavax, Inc. It is specifically designed to target the Omicron XBB.1.5 subvariant. The vaccine is being evaluated as a booster dose to enhance immune responses against this variant in previously vaccinated individuals.