Recent Updates
Recently added Catalysts

XBB.1.5 Vaccine

Phase 2

COVID-19 | Vaccine | Infectious Disease |Novavax, Inc.|Trials Updated: May 30, 2024

XBB.1.5 Vaccine target and mechanism

ModalityVaccine

Also known as XBB.1.5 Vaccine (Booster)

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment660

FDA Designations

No designations recorded

XBB.1.5 Vaccine clinical trials

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
Unlock Study Endpoints

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)
Unlock Study Design Details

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
Unlock Eligibility Criteria

Frequently asked questions about XBB.1.5 Vaccine

What is the XBB.1.5 Vaccine?

The XBB.1.5 Vaccine is an investigational COVID-19 booster vaccine developed by Novavax, Inc. It is designed to boost immune response against the Omicron XBB.1.5 subvariant of SARS-CoV-2 in people who have already been vaccinated as well as in unvaccinated individuals.

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

The XBB.1.5 Vaccine is being studied for use as a COVID-19 booster dose. Its purpose is to evaluate safety and immune response against the Omicron XBB.1.5 subvariant in adults who were previously vaccinated and in those who were not previously vaccinated.

Who makes the XBB.1.5 Vaccine?

The XBB.1.5 Vaccine is developed by Novavax, Inc., which trades on the Nasdaq under the ticker symbol NVAX. Novavax is the sponsor of the clinical program evaluating this COVID-19 booster candidate.

What phase is the XBB.1.5 Vaccine in?

The XBB.1.5 Vaccine is in Phase 2 clinical development. It is an investigational vaccine candidate and has not been approved by the FDA. The Phase 2 study evaluating it has been completed.

What clinical trials is the XBB.1.5 Vaccine in?

The XBB.1.5 Vaccine was evaluated in one Phase 2 trial, NCT05975060, titled a study to evaluate the safety and immunogenicity of an Omicron subvariant COVID-19 vaccine booster dose. That trial enrolled 660 participants in the United States and is completed.

Is the XBB.1.5 Vaccine the same as the XBB.1.5 Vaccine Booster?

Yes. The XBB.1.5 Vaccine Booster is another name for the XBB.1.5 Vaccine developed by Novavax. Both names refer to the same investigational COVID-19 booster candidate studied in the Phase 2 trial NCT05975060.