NCT05895955

Safety and Immunogenicity of GPO Seasonal Tetravalent Inactivated Split Virion Influenza Vaccine in Healthy Thais

A Phase I/II Randomized Double Blind Controlled Study to Evaluate the Safety and Immunogenicity of GPO Seasonal Tetravalent Inactivated Split Virion Influenza Vaccine in Healthy Thais

• Status: Active Not Recruiting
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 290 (estimated)
• Sponsor: Mahidol University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The study is aim to evaluate the safety and immunogenicity of one dose TetraFluvac TF vaccine (15 μg HA per strain per dose) of the GPO seasonal quadrivalent inactivated split virion influenza vaccine in healthy adults aged 18 years and above over 90 days post-injection.

Detailed description

This is a double blind randomized study consisting of two phases - Phase I and Phase II. Phase I of the study A total of 40 healthy participants aged 18 years and above will be enrolled (1:1 ratio, 20 TetraFluvac TF vaccine and 20 Vaxigrip vaccine (Commercially available seasonal quadrivalent split, manufactured by Sanofi Pasteur, Ltd. France) Phase II of the study A total of 250 healthy participants will be enrolled (4:1 ratio, 200 TetraFluvac TF vaccine and 50 Vaxigrip vaccine (Commercially available seasonal quadrivalent split , manufactured by Sanofi Pasteur, Ltd. France) One dose of the TetraFluvac TF or Commercially available seasonal quadrivalent split vaccine for Southern Hemisphere in 2023 will be given 0.5 ml by intramuscular route. Total follow-up is 90 days. The vaccine will be administered via the intramuscular route; the preferred injection site will be the deltoid of the non-dominant arm. After vaccination participants will remain at the clinic for at least 30 minutes to observe for any reactogenicity after immunization. Blood specimens for immune response will be collected on Day 0 prior to vaccination, Day 28, Day 60, and day 90. Blood specimen for safety will be collected Day 28 for participants Phase I only for clinical hematology and chemistry. A DSMB, composed of at least three independent members with expertise in vaccine clinical trials, will be convened to provide additional safety oversight. In Phase I, the DSMB will meet to review all safety profiles of 28 days after immunization. After completing Day 7 of phase I with no safety concern, the screening for phase II can be started. However, the vaccination of phase II will occur after the recommendation of the DSMB.There should be no safety concerns from DSMB meeting for continue Phase II. In Phase II, the DSMB will meet to review all safety profiles after vaccination of 100 participants for completion of Phase II.

Conditions

• Influenza

Interventions

Type	Name	Description
BIOLOGICAL	TetraFluvac TF vaccine	The vaccine is a seasonal quadrivalent inactivated split virion influenza vaccine \[A/Sydney/5/2021(H1N1) pdm09-like virus and A/Darwin/9/2021 (H3N2)-like virus and B/Austria/1359417/2021 (B/Victoria Lineage)-like virus and B/Phuket/3073/2013 (B/Yamagata lineage)-like virus\] produced by The Government Pharmaceutical Organization (GPO), Thailand. Each prefilled dose of TetraFluvac TF contains a total of 60 micrograms (μg) hemagglutinin (HA) per 0.5 ml dose (15 μg HA per strain per dose), to be administered by intramuscular (IM) injection.
BIOLOGICAL	Vaxigrip vaccine	Vaxigrip vaccine is commercially available seasonal quadrivalent inactivated split virion influenza vaccine \[A/Sydney/5/2021(H1N1) pdm09-like strain and A/Darwin/9/2021 (H3N2)-like strain and B/Austria/1359417/2021-like strain and B/Phuket/3073/2013-like strain, manufactured by Sanofi Pasteur, Ltd. France. Each prefilled dose of Vaxigrip vaccine contains a total of 60 micrograms (μg) hemagglutinin (HA) per 0.5 ml dose (15 μg HA per strain per dose), to be administered by intramuscular (IM) injection.

Timeline

• Start date: 2023-11-04
• Primary completion: 2024-03-25
• Completion: 2025-07-31
• First posted: 2023-06-09
• Last updated: 2024-10-09

Locations

1 site across 1 country: Thailand