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AV7909 Full Dose

Phase 2

Anthrax | Monoclonal antibody | Infectious Disease |Icon Plc|Last Updated: Feb 24, 2026

Target and mechanism

Molecular targetTLR9
ModalityMonoclonal antibody

Also known as AV7909 Full Dose (0.5 mL)

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials1
Total Enrollment220

FDA Designations

No designations recorded

Clinical trial landscape

AV7909 Full Dose · 1 trial · 1 indication

Phase 2 1
NCT05997264Anthrax AV7909 Boost Evaluation StudyAnthrax
ACTIVE NOT_RECRUITING220 Analytics
PHASE2ACTIVE NOT_RECRUITING
Anthrax AV7909 Boost Evaluation Study
AnthraxUnlock trial analytics

Study Endpoints

Primary Endpoints

All solicited local and systemic reactogenicity symptoms with onset within 7 days after each investigational product (IP) administration day.
Within 7 days after each IP administration.
Geometric mean titer (GMT) as measured by toxin-neutralizing antibody (TNA) 50% neutralization
Day 64

Secondary Endpoints

Unsolicited treatment-emergent adverse events (TEAEs) with onset within 30 days after each IP administration day.
Within 30 days after each IP administration.
Treatment-emergent serious adverse events (SAEs) up to 1 year after the last IP administration day.
Within 1 year after the last IP administration.
Treatment-emergent potentially immune-mediated medical conditions (PIMMCs) up to 1 year after the last IP administration day.
Within 1 year after the last IP administration.
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeOTHER

Treatment Arms

ArmTypeDescription
Full Dose Schedule 1EXPERIMENTALThis study group will receive full dose AV7909 (0.5mL) at study days 1, 15, 181 and 366. A placebo full dose (0.5 mL) will be administered between the second and third dose of AV7909 at study day 29. Update: Enrollment to this treatment arm was closed on 13 May 2024.
Full Dose Schedule 2EXPERIMENTALThis study group will receive of AV7909 full dose (0.5 mL) at study days 1, 29, 181 and 366. A placebo full dose (0.5 mL) will be administered between the first and second dose of AV7909 at study day 15. Update: Enrollment to this treatment arm was closed on 13 May 2024.
Half Dose Schedule 1EXPERIMENTALThis study group will receive of AV7909 half dose (0.25 mL) at study days 1, 15, 181 and 366. A placebo half dose (0.25 mL) will be administered between the second and third dose of AV7909 at study day 29.
Half Dose Schedule 2EXPERIMENTALThis study group will receive of AV7909 half dose (0.25 mL) at study days 1, 29, 181 and 366. A placebo full dose (0.25 mL) will be administered between the first and second dose of AV7909 at study day 15.

Interventions

NameTypeDescription
AV7909 Full Dose (0.5 mL)BIOLOGICALAV7909 Anthrax Vaccine is being developed by Emergent Product Development Gaithersburg Inc. (Emergent) for post-exposure prophylaxis (PEP) of disease in persons 18 through 65 years of age following suspected or confirmed B. anthracis exposure when administered in conjunction with the recommended antibacterial regimen. AV7909 is a combination product containing BioThrax and CPG 7909, a synthetic immunostimulatory oligodeoxynucleotide that has been shown to be a potent vaccine adjuvant. CPG 7909 is a Toll-like receptor 9 agonist designed to induce both an enhanced antigen-specific antibody response and a natural killer T-cell immune response when used in combination with prophylactic (preventative) or therapeutic vaccines.
AV7909 Half Dose (0.25 mL)BIOLOGICALAV7909 Anthrax Vaccine is being developed by Emergent Product Development Gaithersburg Inc. (Emergent) for PEP of disease in persons 18 through 65 years of age following suspected or confirmed B. anthracis exposure when administered in conjunction with the recommended antibacterial regimen. AV7909 is a combination product containing BioThrax and CPG 7909, a synthetic immunostimulatory oligodeoxynucleotide that has been shown to be a potent vaccine adjuvant. CPG 7909 is a Toll-like receptor 9 agonist designed to induce both an enhanced antigen-specific antibody response and a natural killer T-cell immune response when used in combination with prophylactic (preventative) or therapeutic vaccines.
Placebo: Sodium Chloride Injection, USP 0.9% (0.5 mL)BIOLOGICALSodium chloride 9 mg water for injection Quantum satis (q.s.). It contains no bacteriostat, antimicrobial agent, or added buffer. The solution may contain hydrochloric acid and/or sodium hydroxide for pH adjustment (pH 4.5-7.0).
Placebo: Sodium Chloride Injection, USP 0.9% (0.25 mL)BIOLOGICALSodium chloride 9 mg water for injection Quantum satis (q.s.). It contains no bacteriostat, antimicrobial agent, or added buffer. The solution may contain hydrochloric acid and/or sodium hydroxide for pH adjustment (pH 4.5-7.0).
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes
Study Sites7

Inclusion Criteria: 1. Male or non-pregnant females, 18 through 65 years of age, inclusive. 2. Willing and able to provide written informed consent prior to initiation of study procedures. 3. In relatively stable health, as determined by medical history and physical examination. Any chronic medical...

Countries:United States
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Frequently asked questions about AV7909 Full Dose

What is AV7909 Full Dose used for?

AV7909 Full Dose is an investigational monoclonal antibody being studied for use in anthrax. It is currently in Phase 2 clinical development as a potential preventive or therapeutic agent against anthrax infection.

What does AV7909 Full Dose target?

AV7909 Full Dose targets TLR9, a toll-like receptor involved in immune system activation. By engaging TLR9, the monoclonal antibody is designed to modulate immune responses relevant to anthrax.

Who makes AV7909 Full Dose?

AV7909 Full Dose is being developed by Icon Plc, a biopharmaceutical company listed on the stock exchange under the ticker symbol ICLR.

What phase is AV7909 Full Dose in?

AV7909 Full Dose is currently in Phase 2 clinical development. It is an investigational drug and has not yet been approved by regulatory authorities for commercial use.

What clinical trials is AV7909 Full Dose in?

AV7909 Full Dose is being evaluated in one active clinical trial, NCT05997264, titled 'Anthrax AV7909 Boost Evaluation Study.' This Phase 2 trial is enrolling 220 healthy volunteers in the United States and is currently active but not recruiting participants.

Is AV7909 Full Dose the same as AV7909 Full Dose (0.5 mL)?

Yes, AV7909 Full Dose is also known as AV7909 Full Dose (0.5 mL). The alternative name refers to the specific volume of the dose being administered in clinical studies.