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Virus Therapy

Influenza RG-A/Texas/71/2017 (H3N2) Challenge for Influenza

Phase 1
Waitlist Available
Research Sponsored by National Institute of Allergy and Infectious Diseases (NIAID)
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Provide written informed consent prior to initiation of any study procedure
Are able to understand and comply with planned study procedures and be available for all study visits
Timeline
Screening 3 weeks
Treatment Varies
Follow Up day -1 (baseline), day 8, day 15, and day 29
Awards & highlights

Study Summary

This study is evaluating whether a vaccine can protect against a virus that is similar to the virus that caused the 1918 influenza pandemic.

Eligible Conditions
  • Influenza

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~day -1 (baseline), day 8, day 15, and day 29
This trial's timeline: 3 weeks for screening, Varies for treatment, and day -1 (baseline), day 8, day 15, and day 29 for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Mean Duration of Viral Shedding
Mean Maximum Cumulative Modified Jackson Score (MJS)
Mean Peak Viral Load (VL) After Challenge
+3 more
Secondary outcome measures
Geometric Mean HA-stalk-specific Antibody Titers Against A/Texas/71/2017 (H3N2), Clade 3C3a Virus, by Study Day
Geometric Mean Hemagglutination Inhibition (HAI) Antibody Titers Against A/Texas/71/2017 (H3N2), Clade 3C3a Virus, by Study Day
Geometric Mean Microneutralization (MN) Antibody Titers Against A/Texas/71/2017 (H3N2), Clade 3C3a Virus, by Study Day
+7 more

Side effects data

From 2022 Phase 1 trial • 60 Patients • NCT04978454
11%
Blood pressure systolic increased
8%
Heart rate increased
8%
Tachycardia
6%
Blood pressure diastolic decreased
6%
Blood pressure diastolic increased
3%
Rash
3%
Respiratory rate increased
3%
Skin laceration
3%
Epistaxis
3%
Hypertension
100%
80%
60%
40%
20%
0%
Study treatment Arm
10^6 TCID50 Challenge Virus
10^4 TCID50 Challenge Virus
Sham Inoculum
10^5 TCID50 Challenge Virus

Trial Design

8Treatment groups
Experimental Treatment
Group I: Cohort 3BExperimental Treatment2 Interventions
10^6 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=17) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1. N = 18
Group II: Cohort 3AExperimental Treatment2 Interventions
10^6 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=17) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1. If no safety threshold is met (halting conditions) proceed to Cohort 3B. N = 18
Group III: Cohort 2CExperimental Treatment2 Interventions
10^5 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=12) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1. If 70% or more of the subjects in Cohorts 2A, 2B, and 2C combined meet the case definition for influenza then the optimal dose of 10^4 TCID50 will be selected. Cumulatively, if fewer than 70% of subjects in Cohorts 2A, 2B, and 2C meet the case definition for influenza the dose will escalate to include Cohort 3A. N = 13
Group IV: Cohort 2BExperimental Treatment2 Interventions
10^5 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=12) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1.If 70% or more subjects in Cohort 2A and 2B meet the case definition for influenza, proceed to Cohort 2C. Cumulatively, if fewer than 70% of subjects in Cohorts 2A and 2B meet the case definition for influenza, the dose will escalate to include Cohort 3A N = 13
Group V: Cohort 2AExperimental Treatment2 Interventions
10^5 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=12) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1. If 70% or more subjects in Cohort 2A meet the case definition for influenza, proceed to Cohort 1B. If fewer than 70% of subjects meet the case definition for influenza in Cohort 2A, the dose will escalate to include Cohort 3A. N = 13
Group VI: Cohort 1CExperimental Treatment2 Interventions
10^4 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=12) and sham sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1. If 80% or more of the subjects in Cohorts 1A, 1B, and 1C combined meet the case definition for influenza then the optimal dose of 104 TCID50 will be selected. Cumulatively, if fewer than 80% of subjects in Cohorts 1A, 1B, and 1C meet the case definition for influenza the dose will escalate to include Cohort 2A. N = 13
Group VII: Cohort 1BExperimental Treatment2 Interventions
10^4 TCID50 of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5 mL per nostril) influenza virus (n=12) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5 mL per nostril) (n=1) administered intranasally on Day 1. If 80% or more subjects in Cohort 1A and 1B meet the case definition for influenza, proceed to Cohort 1C. Cumulatively, if fewer than 80% of subjects in Cohorts 1A and 1B meet the case definition for influenza, the dose will escalate to include Cohort 2A. N = 13
Group VIII: Cohort 1AExperimental Treatment2 Interventions
10^4 TCID50of recombinant H3N2 (A/Texas/71/2017, clade 3C3a) 1.0 mL (0.5mL per nostril) influenza virus (n=12) and Sham Sucrose phosphate glutamate (SPG) inoculum 1.0 mL (0.5mL per nostril) (n=1) administered intranasally on Day 1. If 80% or more subjects in Cohort 1A meet the case definition for influenza, proceed to Cohort 1B. If fewer than 80% of subjects meet the case definition for influenza in Cohort 1A, the dose will escalate to include Cohort 2A. N = 13
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
Influenza RG-A/Texas/71/2017 (H3N2) Challenge
2021
Completed Phase 1
~60

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Logistics

Participation is compensated

You will be compensated for participating in this trial.

Who is running the clinical trial?

National Institute of Allergy and Infectious Diseases (NIAID)Lead Sponsor
3,261 Previous Clinical Trials
5,482,946 Total Patients Enrolled

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.
~17 spots leftby Mar 2025