| Active Not Recruiting | A Trial of a Norovirus G1.1 and G2.4 Vaccine Administered Orally to Healthy Participants Aged ≥ 18 Years and ≤ Norovirus Infections | Phase 1 | 2025-03-03 |
| Active Not Recruiting | A Study to Evaluate VXA-CoV2-3.3 COVID-19 Vaccine Against Currently Approved/Authorized mRNA COVID-19 Injectab SARS-CoV2, COVID-19 | Phase 2 | 2024-10-08 |
| Completed | A Study to Evaluate Vaxart's Oral Bivalent GI.1/GII.4 Norovirus Vaccine in Healthy Lactating Females and Their Norovirus Infections | Phase 1 | 2023-10-27 |
| Completed | A Study to Determine the Safety and Immunogenicity of Bivalent GI.1 and GII.4 Vaccines in Healthy Volunteers Norovirus Infections | Phase 2 | 2023-01-26 |
| Completed | A Phase 1, Open-label, Safety and Immunogenicity Study of an Oral Multi-dose Administration Regimen With an Ad Norovirus Infections | Phase 1 | 2022-01-24 |
| Completed | Norovirus Challenge Study Norovirus Infections | Phase 1 / Phase 2 | 2021-12-27 |
| Terminated | A Ph 2 Trial With an Oral Tableted COVID-19 Vaccine COVID-19 | Phase 2 | 2021-10-22 |
| Completed | Immunogenicity & Safety Study of Adenovirus Type 5 (AD5) Based Oral Norovirus Vaccines Norovirus Infections | Phase 1 / Phase 2 | 2021-04-30 |
| Completed | Ph 1b: Safety & Immunogenicity of Ad5 Based Oral Norovirus Vaccine Norovirus Infections | Phase 1 | 2021-04-26 |
| Completed | Safety and Immunogenicity Trial of an Oral SARS-CoV-2 Vaccine (VXA-CoV2-1) for Prevention of COVID-19 in Healt Covid19 | Phase 1 | 2020-09-21 |
| Completed | Safety & Immunogenicity Study of Ad5 Based Oral Norovirus Vaccines Norovirus Infection | Phase 1 | 2019-03-20 |
| Completed | Dose-Optimization Trial of VXA-G1.1-NN in Healthy Volunteers Norovirus Gastroenteritis | Phase 1 | 2017-04-07 |
| Completed | Pharmacodynamic Open-Label Trial With VXA-A1.1 Oral H1 Vaccine in Healthy Adults Seasonal Influenza Preventative Vaccine Pharmacodynamics | Phase 1 | 2017-03-31 |
| Completed | A Phase 2 Influenza A Challenge Study Following Oral Administration of an H1N1 HA Ad-Vector Seasonal Flu Vacci Influenza | Phase 2 | 2016-08-31 |
| Completed | Phase 1 Placebo-controlled, Randomized Trial of an Adenoviral-vector Based Norovirus Vaccine Norovirus Gastroenteritis | Phase 1 | 2016-07-29 |
| Completed | Dose-Ranging Trial of Safety & Immunogenicity of an Oral Adenoviral-Vector Based RSV Vaccine (VXA-RSV-f) Respiratory Syncytial Virus (RSV) | Phase 1 | 2016-06-22 |
| Completed | A Study to Assess the Safety, Tolerability, Pharmacokinetics and Efficacy of Twice Daily Topical Applications Condyloma | Phase 2 | 2016-01-01 |
| Completed | Assessment of an Oral Influenza B Vaccine Tablet (VXA-BYW.10) Following Single Dose Administration in Healthy Seasonal Influenza B | Phase 1 | 2015-10-20 |
| Completed | Immunogenicity of Seasonal Influenza by Delivery Directly to Ileum Seasonal Influenza | Phase 1 | 2013-01-01 |
| Completed | Safety Study of an Oral Vaccine to Prevent Seasonal Influenza Influenza | Phase 1 | 2012-09-01 |
| Completed | Immunogenicity of ND1.1 by Delivery Directly to the Ileum Avian Influenza | Phase 1 | 2012-09-01 |
| Completed | Safety Study of an Oral Vaccine to Prevent Avian Influenza Avian Influenza, Bird Flu | Phase 1 | 2011-04-01 |
| Withdrawn | A Study of Vapendavir Treatment of Hematopoietic Stem Cell Transplant Subjects With Symptomatic Rhinovirus Inf Rhinovirus, Upper Respiratory Tract Infection | Phase 2 | — |