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AZD9838

Phase 1

COVID-19 | Monoclonal antibody | Infectious Disease |AstraZeneca PLC|Last Updated: Jun 29, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedACTIVE_CONTROLLED
Total Trials1
Total Enrollment243
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06147063A Randomized Trial Evaluating a mRNA-VLP Vaccine's Immunogenicity and Safety for COVID-19PHASE1 COMPLETED 243Nov 27, 2023Mar 27, 2025Jun 29, 20255 United States
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Study Endpoints
Primary Endpoints
Incidence of immediate unsolicited adverse events (AE)
Within 30 minutes post vaccination

Number of participants who experienced immediate unsolicited AEs within 30 minutes post vaccination.

Incidence of solicited adverse reactions (AR)
Through 7 days post vaccination.

Number of participants who experienced injection site and systemic solicited ARs through 7 days post vaccination.

Incidence of unsolicited adverse events (AE)
Through 28 days post vaccination.

Number of participants who experienced unsolicited AEs through 28 days post vaccination.

Incidence of serious adverse events (SAE)
Through 12 months post vaccination

Number of participants who experienced SAEs through 12 months post vaccination.

Incidence of medically attended adverse events (MAAE)
Through 12 months post vaccination

Number of participants who experienced MAAEs through 12 months post vaccination.

Incidence of adverse events of special interest (AESI)
Through 12 months post vaccination

Number of participants who experience AESIs through 12 months post vaccination.

Geometric mean titer (GMT) for SARS-CoV-2 ancestral strain neutralizing antibodies
Day 29

GMT for SARS-CoV-2 ancestral strain neutralizing antibodies

Geometric mean titer (GMT) for SARS-CoV-2 Omicron BA.4/5 neutralizing antibodies
Day 29

GMT for SARS-CoV-2 Omicron BA.4/5 neutralizing antibodies

Geometric mean titer (GMT) for SARS-CoV-2 Omicron XBB.1.5 neutralizing antibodies
Day 29

GMT for SARS-CoV-2 Omicron XBB.1.5 neutralizing antibodies

Geometric mean fold rise (GMFR) for SARS-CoV-2 ancestral strain neutralizing antibodies
Day 1 to Day 29

GMFR for SARS-CoV-2 ancestral strain neutralizing antibodies

Geometric mean fold rise (GMFR) for SARS-CoV-2 Omicron BA.4/5 neutralizing antibodies
Day 1 to Day 29

GMFR for SARS-CoV-2 Omicron BA.4/5 neutralizing antibodies

Geometric mean fold rise (GMFR) for SARS-CoV-2 Omicron XBB.1.5 neutralizing antibodies
Day 1 to Day 29

GMFR for SARS-CoV-2 Omicron XBB.1.5 neutralizing antibodies

Proportion of participants with neutralizing antibody seroresponse against SARS-CoV-2 ancestral strain
Day 1 to Day 29

Proportion of participants with neutralizing antibody seroresponse against SARS-CoV-2 ancestral strain, defined as GMFR \>=4 from baseline

Proportion of participants with neutralizing antibody seroresponse against SARS-CoV-2 Omicron BA.4/5
Day 1 to Day 29

Proportion of participants with neutralizing antibody seroresponse against SARS-CoV-2 Omicron BA.4/5, defined as GMFR \>=4 from baseline

Proportion of participants with neutralizing antibody seroresponse against SARS-CoV-2 Omicron XBB.1.5
Day 1 to Day 29

Proportion of participants with neutralizing antibody seroresponse against SARS-CoV-2 Omicron XBB.1.5, defined as GMFR \>=4 from baseline

Secondary Endpoints
Geometric mean titer (GMT) for SARS-CoV-2 ancestral strain neutralizing antibodies
Day 1 to Day 360
Geometric mean titer (GMT) for SARS-CoV-2 Omicron BA.4/5 neutralizing antibodies
Day 1 to Day 360
Geometric mean titer (GMT) for SARS-CoV-2 Omicron XBB.1.5 neutralizing antibodies
Day 1 to Day 360
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
Arm 1: dosage 1 of AZD9838 18 to 64 years of ageEXPERIMENTALParticipants will receive 1 intramuscular dose of AZD9838.
Arm 2: dosage 2 of AZD9838 18 to 64 years of ageEXPERIMENTALParticipants will receive 1 intramuscular dose of AZD9838.
Arm 3: licensed mRNA vaccine 18 to 64 years of ageACTIVE_COMPARATORParticipants will receive 1 intramuscular dose of the licensed mRNA vaccine.
Arm 4: dosage 1 of AZD6563 18 to 64 years of ageEXPERIMENTALParticipants will receive 1 intramuscular dose of AZD6563.
Arm 5: dosage 2 of AZD6563 18 to 64 years of ageEXPERIMENTALParticipants will receive 1 intramuscular dose of AZD6563.
Arm 6: dosage 1 of AZD6563 65 years of age and olderEXPERIMENTALParticipants will receive 1 intramuscular dose of AZD6563.
Arm 7: dosage 2 of AZD6563 65 years of age and olderEXPERIMENTALParticipants will receive 1 intramuscular dose of AZD6563.
Arm 8: licensed mRNA vaccine 65 years of age and olderACTIVE_COMPARATORParticipants will receive 1 intramuscular dose of the licensed mRNA vaccine.
Interventions
NameTypeDescription
AZD9838BIOLOGICALIntramuscular (IM) injection.
Licensed mRNA vaccineBIOLOGICALIntramuscular (IM) injection.
AZD6563BIOLOGICALIntramuscular (IM) injection.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersYes
Study Sites5

Key Inclusion Criteria: * Adults ≥ 18 years at the time of signing informed consent. * Self-reported History of SARS-CoV-2 infection at least 6 months prior to study vaccination AND/OR prior completion of primary series vaccination against COVID-19, with the final dose received at least 6 months pr...

Countries:United States
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