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A Phase 2 Double-blind, Randomized, Controlled Trial to Assess the Safety and Immunogenicity of 10 mcg HXP-GPOVac Vaccine in Healthy Volunteers

A Phase 2 Double-blind, Randomized, Controlled Trial to Assess the Safety and Immunogenicity of 10 mcg HXP-GPOVac Vaccine in Healthy Volunteers

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
TCTR
Registry ID
TCTR20220804007
Enrollment
300
Registered
2022-08-04
Start date
2022-08-19
Completion date
Unknown
Last updated
2026-03-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy male and female subjects Healthy male and female subjects

Interventions

HXP-GPOVac vaccine 10 mcg IM (2 doses on Day 1 and Day 29),Comirnaty vaccine IM (2 doses on Day 1 and Day 29)
HXP-GPOVac,Comirnaty

Sponsors

The Government Pharmaceutical Organization
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 60 Years

Inclusion criteria

Inclusion criteria: 1. Male or female age 18-75 years old. 2.Has never received any COVID-19 vaccine before. 3.Has negative COVID-19 test result. 4.Has a body mass index (BMI) of 17 to 30 kg/m2 5.Having no clinically significant acute medical condition, and no chronic medical condition that has not been controlled within 90 days of randomization as determined by medical history, physical examination, screening laboratory test results, and clinical assessment of the investigator. 6.If a woman is of childbearing potential, must not be breastfeeding or be pregnant (based on a negative urine pregnancy test at screening and a negative urine pregnancy test during the 24 hours prior to receipt of the first dose of IP), must plan to avoid pregnancy for at least 28 days after the last dose of IP, and be willing to use an adequate method of contraception consistently and have a repeated pregnancy test prior to the second (last) dose of IP. 7.Be able to read and write in Thai and willing to sign an informed consent form. 8.Resides in the study site area and is able and willing to adhere to all protocol visits and procedures.

Exclusion criteria

Exclusion criteria: 1.Use of any investigational medicinal product of any non-study vaccine within 90 days prior to randomization or planned use of such a product during the period of study participation. 2.History of administration of any non-study vaccine within 28 days prior to administration of study vaccine or planned vaccination during the course of study participation. 3.Has positive COVID-19 test result or history of COVID-19 infection. 4.Previous receipt of an investigational vaccine for SARS or MERS, or any investigational or licensed vaccine that may have an impact on the interpretation of the trial results. 5.History of hypersensitivity reaction to any prior vaccination or known hypersensitivity to any component of the study vaccine. 6.History of chicken or egg allergy. 7.History of angioedema after receiving any medication that could lead to TEN anaphylaxes. 8.History of Anaphylaxis from any causes (known or unknown) 9.Acute illness (moderate or severe) and/or fever (body temperature measured orally greater than or equal to 38.0 Celsius ). 10.Any abnormal vital sign deemed clinically relevant by the PI. 11.Abnormality grade 3 severity or more in screening laboratory test (see detail in appendix B). 12.A positive serologic test for human immunodeficiency virus (HIV Ab), hepatitis B (HBsAg), or hepatitis C (HCV Ab). 13.History of malignancy, excluding non-melanoma skin and cervical carcinoma in situ. 14.Any confirmed or suspected immunosuppressive or immunodeficient state. 15.Administration of immunoglobulin or any blood product within 90 days prior to first study injection or planned administration during the study period. 16.Administration of any long-acting immune-modifying drugs (example: infliximab or rituximab) or the chronic administration (defined as more than 14 days) of immunosuppressants within six months prior to the first study injection, or planned administration during the study period (includes systemic corticosteroids at doses equivalent to greater than or equal to 0.5 mg/kg/day of prednisolone; the use of topical steroids including inhaled and intranasal steroids is permitted). 16.History of known disturbance of coagulation or blood disorder that could cause anemia or excess bleeding (example: thalassemia, coagulation factor deficiencies). 17.Recent history (within the past year) or signs of being an alcoholic with a high-risk level (13 scores or more, according to the alcoholic questionnaire by The Department of Mental Health) 18.Any medical, psychiatric or behavioral condition that in the opinion of the PI may interfere with the study objectives, pose a risk to the subject, or prevent the subject from completing the study follow-up. 19.Employee of any person employed by the sponsor, the contract research organization (CRO), the PI, study site personnel, or site.

Design outcomes

Primary

MeasureTime frame
GMT ratio of humural immune response, seroconversion rate of humural immune response meameasured at baseline and 14 days after the second vaccination in a subset of participants.sured at baseline and 14 days after the second vaccination in a subset of participants. Pseudovirus neutralization assay

Secondary

MeasureTime frame
GMT ration of humual immune response ,Anti-S IgG GMT, S protein-specific T cell response 14 days and 3, 6, and 12 months after second vaccination in a subset of participants ELISA, Pseudovirus neutralization assay and ELISpot

Countries

Thailand

Contacts

Public ContactDr. Kriengkrai Prasert

Nakhon Phanom Provincial Hospital

gpsiam28@gmail.com0819755460

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Apr 4, 2026