Vaxart

19 total trials 16 completed

Vaxart sponsors 19 registered US clinical trials on ClinicalTrials.gov, none currently recruiting, and 16 completed. 0 of these trials are in Phase 3-4 (later-stage) and 19 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Norovirus Infections, with 1 trials.

Trial Pipeline

19 total, page 1 of 1

ACTIVE NOT RECRUITING Phase 1

A Trial of a Norovirus G1.1 and G2.4 Vaccine Administered Orally to Healthy Participants Aged ≥ 18 Years and ≤ 80 Years Old

NCT06944717

ACTIVE NOT RECRUITING Phase 2

A Study to Evaluate VXA-CoV2-3.3 COVID-19 Vaccine Against Currently Approved/Authorized mRNA COVID-19 Injectable Booster Vaccine in Adults Previously Immunized Against COVID-19 Infection

NCT06672055

COMPLETED Phase 2

A Study to Determine the Safety and Immunogenicity of Bivalent GI.1 and GII.4 Vaccines in Healthy Volunteers

NCT05626803

COMPLETED Phase 1

A Phase 1, Open-label, Safety and Immunogenicity Study of an Oral Multi-dose Administration Regimen With an Adenoviral-vector Based Tablet Norovirus Vaccine (VXA-G1.1-NN) Administered to Healthy Adult Volunteers

NCT05213728

COMPLETED Phase 1

Norovirus Challenge Study

NCT05212168

TERMINATED Phase 2

A Ph 2 Trial With an Oral Tableted COVID-19 Vaccine

NCT05067933

COMPLETED Phase 1

Immunogenicity & Safety Study of Adenovirus Type 5 (AD5) Based Oral Norovirus Vaccines

NCT04875676

COMPLETED Phase 1

Ph 1b: Safety & Immunogenicity of Ad5 Based Oral Norovirus Vaccine

NCT04854746

COMPLETED Phase 1

Safety and Immunogenicity Trial of an Oral SARS-CoV-2 Vaccine (VXA-CoV2-1) for Prevention of COVID-19 in Healthy Adults and Boost (VXA-CoV2-1.1-S) at 1 Year Post Initial Vaccination in Subset of Subjects

NCT04563702

COMPLETED Phase 1

Safety & Immunogenicity Study of Ad5 Based Oral Norovirus Vaccines

NCT03897309

COMPLETED Phase 1

Dose-Optimization Trial of VXA-G1.1-NN in Healthy Volunteers

NCT03125473

COMPLETED Phase 1

Pharmacodynamic Open-Label Trial With VXA-A1.1 Oral H1 Vaccine in Healthy Adults

NCT03121339

COMPLETED Phase 2

A Phase 2 Influenza A Challenge Study Following Oral Administration of an H1N1 HA Ad-Vector Seasonal Flu Vaccine

NCT02918006

COMPLETED Phase 1

Phase 1 Placebo-controlled, Randomized Trial of an Adenoviral-vector Based Norovirus Vaccine

NCT02868073

COMPLETED Phase 1

Dose-Ranging Trial of Safety & Immunogenicity of an Oral Adenoviral-Vector Based RSV Vaccine (VXA-RSV-f)

NCT02830932

COMPLETED Phase 1

Immunogenicity of Seasonal Influenza by Delivery Directly to Ileum

NCT01761123

COMPLETED Phase 1

Safety Study of an Oral Vaccine to Prevent Seasonal Influenza

NCT01688297

COMPLETED Phase 1

Immunogenicity of ND1.1 by Delivery Directly to the Ileum

NCT01698060

COMPLETED Phase 1

Safety Study of an Oral Vaccine to Prevent Avian Influenza

NCT01335347

Phase Distribution

PhaseTrial count
Phase 1 15
Phase 2 4

What the Pipeline for Vaxart Shows

According to the ClinicalTrials.gov registry, Vaxart is linked to 19 US clinical trials across every stage of research activity. Of those, 0 studies are currently recruiting, about 0% of the sponsor's indexed portfolio, and 16 are already marked complete, representing roughly 84% of the total.

The phase mix for Vaxart reports 0 late-stage studies (Phase 3 and Phase 4 combined) and 19 earlier-phase studies (Phase 1 and Phase 2).

The top therapeutic focus area indexed for Vaxart is Norovirus Infections with 1 linked trial, and 5 other condition areas appear in the top list above.

How to read these pipeline numbers

Recruiting share is one of the more practical signals here: it reflects how much of a sponsor's research is presently open to new participants, while the completed share indicates the depth of finished work that has already contributed registry results. Both counts come directly from the public ClinicalTrials.gov dataset and are refreshed on the registry side; this page mirrors the latest data pull without altering it.

A portfolio weighted toward Phase 3 usually reflects an organization advancing candidates toward regulatory review, where the research centers on comparative efficacy and broader safety across larger populations. A heavier Phase 1 and Phase 2 tilt generally indicates exploratory work, safety, dosing, and early signal detection, and is common among research-forward sponsors that seed many early programs. Phase 4 entries, when present, track interventions already in real-world use and typically focus on long-term safety, effectiveness across subgroups, or formulation comparisons.

That distribution is a quick read of where the organization concentrates its research attention; it does not imply product availability, market share, or any clinical endorsement. All numbers on this page come from ClinicalTrials.gov maintained by the National Library of Medicine, and counts can shift as new studies are registered or existing ones update their status. This information is provided for reference and educational purposes only, not as medical, investment, or regulatory advice, verify current details directly with ClinicalTrials.gov before relying on any figure here.

Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainTrial Editorial

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered trial from this sponsor, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.