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NasoShield

Phase 1

Healthy Volunteers | Monoclonal antibody | Other |Altimmune, Inc.|Last Updated: Jun 24, 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
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials2
Total Enrollment188
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04415749NasoShield in Healthy Adults to Study Safety and ImmunogenicityPHASE1 COMPLETED 43Jun 15, 2020Mar 15, 2021Jun 24, 20251 United States
NCT03352466NasoShield Study of Safety and ImmunogenicityPHASE1 COMPLETED 145Jan 18, 2018May 13, 2019Jun 24, 20252 United States
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Study Endpoints
Primary Endpoints
Reactogenicity to evaluate the safety of NasoShield
For 7 days after vaccination

Subjects will record solicited local and systemic events for 7 days after each dose

Adverse Events (AEs) to evaluate the safety of NasoShield
From Day 1 to Day 210

All adverse events from Day 1 to Day 57; serious adverse events (SAE), medically attended adverse events (MAAE), and new-onset chronic illnesses (NCI) from Day 1 to Day 210

Reactogenicity
For 14 days after vaccination

Subjects will record solicited local and systemic events for 14 days after each dose

Adverse events (AEs)
From Day 1 to Day 361

All adverse events from Day 1 to Day 57, SAEs, medically attended AEs and new onset chronic illnesses Day 1 to Day 361

Secondary Endpoints
Anti-protective antigen (PA) immunoglobulin G (IgG) to evaluate humoral immunogenicity
From Day 1 to Day 210
Toxin neutralization antibody 50% neutralization factor (TNA-NF50) titer measured in serum by cytotoxic assay to evaluate humoral immunogenicity
From Day 1 to Day 210
Anti-protective antigen (PA) immunoglobulin A (IgA) to evaluate mucosal immune response
From Day 1 to Day 57
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
NasoShield One Dose in Position 1EXPERIMENTALNasoShield (1 x 10\^11 vp) on Day 1 and saline placebo on Day 29 in position 1 (Group 1) in normal sitting position (no dose holding time)
Placebo in Position 1PLACEBO_COMPARATORSaline placebo on Day 1 and saline placebo on Day 29 in position 1 (Group 1)
NasoShield Two Doses in Position 2EXPERIMENTALNasoShield (1 x 10\^11 vp) on Day 1 and Day 29 in position 2 (Group 2) in sitting position with nostrils elevated above head for 3 minutes followed by sitting for 27 minutes
Placebo in Position 2PLACEBO_COMPARATORSaline placebo on Day 1 and Day 29 in position 2 (Group 2)
NasoShield Two Doses in Position 3EXPERIMENTALNasoShield (1 x 10\^11 vp) on Day 1 and Day 29 in position 3 (Group 3) in supine position for 30 minutes
Placebo in Position 3PLACEBO_COMPARATORSaline placebo on Day 1 and Day 29 in position 3 (Group 3)
NasoShield very low dose - 1 X 10^8 vpEXPERIMENTALSingle intranasal spray (Part A)
NasoShield low dose - 1 X 10^9 vpEXPERIMENTALSingle intranasal spray (Part A)
NasoShield medium dose - 1 X 10^10 vpEXPERIMENTALSingle intranasal spray (Part A)
NasoShield high dose - Part A -1 X 10^11 vpEXPERIMENTALSingle intranasal spray (Part A)
NasoShield high dose - Part B - 1 X 10^11 vpEXPERIMENTAL2 intranasal sprays 21 days apart (Part B)
PlaceboPLACEBO_COMPARATORNormal saline, single intranasal spray (Part A) or two intranasal sprays 21 days apart (Part B)
BioThraxACTIVE_COMPARATORThree intramuscular injections 15 days apart (Part A)
Interventions
NameTypeDescription
NasoShieldBIOLOGICALNasoShield is an adenovirus-vectored anthrax vaccine
PlaceboOTHERNormal saline
BioThraxBIOLOGICALCommercially available anthrax vaccine
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Eligibility Criteria
Age Range18 Years — 49 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Men and women 18 to 49 years of age, inclusive 2. Good general health status 3. Adequate venous access for repeated phlebotomies 4. Screening laboratory results within institutional normal range or Grade 1 abnormality if the Investigator documents clinical insignificance. Cre...

Countries:United States
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