Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.

NCT04563702 · ClinicalTrials.gov registry record · 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

A Phase 1 study of COVID-19, sponsored by Vaxart.

Completed
Registry status
Phase 1
Development phase
35
Enrollment target
1
Study location

NCT04563702: Completed Phase 1 study of COVID-19, sponsored by Vaxart.

NCT04563702 is a Phase 1 study of COVID-19 that has completed, run by Vaxart. The registered enrollment target is 35 participants, below the 38,465-participant average among 298 other COVID-19 trials with a reported enrollment target (100% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.

View on ClinicalTrials.gov ↗

View your shortlist →

The verdict

NCT04563702, a Phase 1 study of COVID-19, has completed, sponsored by Vaxart.

COMPLETED
Registry status
Phase 1
Development phase
35 participants
Enrollment target
1
Study location

Study Summary

VXA-CoV2-1 is a non-replicating Ad5 vector adjuvanted oral tableted vaccine being developed to prevent COVID-19, the disease resulting from Severe Acute Respiratory Syndrome coronavirus (SARS-CoV-2) infection. The study is designed to evaluate the safety and immunogenicity of VXA-CoV2-1 vaccine with repeat dosing at multiple dose levels. Safety and immunogenicity will be evaluated for up to 12 months after the second dose of VXA-CoV2-1.

Primary Outcome

Subject reported symptoms of local and systemic reactogenicity

Conditions Studied

Interventions

  • BIOLOGICAL VXA-CoV2-1

Study Locations (1)

California

  • WCCT - Cypress

Trial Details

FieldValue
Enrollment Target 35 participants
Start Date 2020-09-21
Est. Completion 2021-10-10
Phase Phase 1
Vaxart

19 total trials

What the finished NCT04563702 record still lists

NCT04563702 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 35 participants, a relatively small participant target, below the 38,465-participant average among 298 other COVID-19 trials with a reported enrollment target (100% lower).

The record links to 1 condition, with COVID-19 appearing as the primary indexed condition, and to 1 intervention - of which VXA-CoV2-1 is the first listed.

NCT04563702 reports a single indexed study location in California.

Frequently Asked Questions

What is clinical trial NCT04563702 about?

NCT04563702 is a clinical study titled "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". VXA-CoV2-1 is a non-replicating Ad5 vector adjuvanted oral tableted vaccine being developed to prevent COVID-19, the disease resulting from Severe Acute Respiratory Syndrome coronavirus (SARS-CoV-2) infection. The study is designed to evaluate the safety and immunogenicity of VXA-CoV2-1 vaccine with...

What is the current status of trial NCT04563702?

This trial is currently completed. It is a Phase 1 study. The enrollment target is 35 participants. The study started on 2020-09-21. Estimated completion is 2021-10-10.

What conditions does trial NCT04563702 study?

This clinical trial studies the following conditions: COVID-19.

What interventions are being tested in trial NCT04563702?

The interventions under investigation include: VXA-CoV2-1 (BIOLOGICAL).

Who is sponsoring clinical trial NCT04563702?

This trial is sponsored by Vaxart, which has 19 total clinical trials registered on ClinicalTrials.gov.

Where is trial NCT04563702 being conducted?

This trial has 1 study location across California. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.

Similar trials for COVID-19

Matched on the same primary condition, ranked to surface studies in the same phase first, then by recruiting status, no relevance scoring or editorial curation.

Where NCT04563702's enrollment target sits among peer trials

35 262nd of 298 higher than 36 of 298 other COVID-19 trials

participants (enrollment target), bucketed by value

Each bar is a band; taller bars hold more other COVID-19 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source ClinicalTrials.gov registry export · 2026-08-08

Nationwide trials with similar profiles

Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.

Similar enrollment target

  • NCT01697371 · 35 participants · NA

    Proton Therapy in the Treatment of Liver Metastases

  • NCT01940757 · 35 participants · Phase 1

    Experimental Infection of Hookworm-naïve Adults With Dermally-applied Infectious Necator Americanus Hookworm Larvae

  • NCT02235857 · 35 participants · NA

    Post Approval Study of Liposorber LA-15 System for the Treatment of Focal Segmental Glomerulosclerosis in Children

  • NCT02637934 · 35 participants · Phase 1

    Phase I Pilot Study of Biodistribution, Metabolism and Excretion of Novel Radiotracer [18F]Fluorthanatrace (FTT) by PET/CT

Similar registry start date

  • NCT05962346 · started 2026-12 · NA

    Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia

  • NCT07125183 · started 2026-12 · Phase 2

    Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma

  • NCT07292298 · started 2026-11 · Phase 2

    Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates

  • NCT04263285 · started 2026-10 · NA

    Treatment of Depression Post-SCI

Source: ClinicalTrials.gov NCT04563702, the US trial registry maintained by the National Library of Medicine. NCT04563702 (small enrollment · single site footprint · completed) retrieved and formatted by PlainTrial, see methodology.