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NasoShield

Phase 1

Healthy Volunteers | Monoclonal antibody | Other |Altimmune, Inc.|Last Updated: Jun 24, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment188

FDA Designations

No designations recorded

Clinical trial landscape

NasoShield · 2 trials · 1 indication

Phase 1 2
NCT04415749NasoShield in Healthy Adults to Study Safety and ImmunogenicityHealthy Volunteers
COMPLETED43 Analytics
NCT03352466NasoShield Study of Safety and ImmunogenicityHealthy Volunteers
COMPLETED145 Analytics
PHASE1COMPLETED
NasoShield in Healthy Adults to Study Safety and Immunogenicity
Healthy VolunteersUnlock trial analytics
PHASE1COMPLETED
NasoShield Study of Safety and Immunogenicity
Healthy VolunteersUnlock trial analytics

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 to 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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Frequently asked questions about NasoShield

What is NasoShield used for?

NasoShield is an investigational monoclonal antibody being studied in healthy volunteers. It is being evaluated for safety and immunogenicity in clinical trials. NasoShield is not approved by the FDA and remains in clinical development.

Who makes NasoShield?

NasoShield is being developed by Altimmune, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol ALT. The company is conducting clinical trials to evaluate the safety and immunogenicity of NasoShield in healthy adult volunteers.

What phase is NasoShield in?

NasoShield is in Phase 1 clinical development. Two Phase 1 trials have been completed, with a total of 188 participants enrolled. Both trials were randomized, double-blind, and placebo-controlled, and they evaluated the safety and immunogenicity of NasoShield in healthy volunteers.

What clinical trials is NasoShield in?

NasoShield has been studied in two completed Phase 1 clinical trials. The first trial, NCT03352466, enrolled 145 healthy volunteers in the United States. The second trial, NCT04415749, enrolled 43 healthy adults in the United States. Both trials assessed safety and immunogenicity.

Is NasoShield the same as any other drug?

NasoShield is the proprietary name for the investigational monoclonal antibody developed by Altimmune, Inc. No alternative names for NasoShield have been disclosed in the clinical trial records. The drug is being studied under the name NasoShield in its clinical trials.