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mRNA Vaccine

H1ssF-3928 Vaccine for Influenza

Phase 1
Recruiting
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
Be between 18 and 65 years old
Timeline
Screening 3 weeks
Treatment Varies
Follow Up day 1 through day 366
Awards & highlights

Study Summary

This trial studies the safety and effectiveness of a new vaccine in healthy adults aged 18-49. A separate group of 10 participants will receive licensed quadrivalent influenza vaccine. Up to 10 subjects per dose group will be enrolled.

Who is the study for?
Healthy adults aged 18-49, with stable blood pressure and pulse, a BMI of 18 to <35 kg/m^2, who've had an influenza vaccine in the last five seasons. Women must not be pregnant or breastfeeding and agree to contraception. Excludes those with immune conditions, recent drug abuse, psychiatric hospitalization, or certain medication use.Check my eligibility
What is being tested?
The trial is testing a new mRNA-LNP flu vaccine called H1ssF_3928 at different doses (10 mcg, 25 mcg, and 50 mcg) against a licensed quadrivalent flu vaccine. It's an open-label study where healthy volunteers receive one dose intramuscularly to evaluate safety and immune response.See study design
What are the potential side effects?
Potential side effects may include typical reactions at the injection site like pain or swelling, general symptoms such as fever or fatigue after vaccination. Since it's a Phase I trial focused on safety, close monitoring for any adverse events will occur.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~day 1 through day 366
This trial's timeline: 3 weeks for screening, Varies for treatment, and day 1 through day 366 for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Occurrence of adverse events of special interest (AESIs) corresponding to myocarditis, pericarditis, or myopericarditis with VRC H1ssF_3928 mRNA-LNP vaccine
Occurrence of any adverse events of special interest (AESIs) with VRC H1ssF_3928 mRNA-LNP vaccine.
Occurrence of any influenza-like illnesses (ILIs) with VRC H1ssF_3928 mRNA-LNP vaccine.
+6 more
Secondary outcome measures
Geometric mean fold rise (GMFR) of anti-stalk serum antibodies measured by enzyme linked immunosorbent assay (ELISA).
Geometric mean fold rise (GMFR) of homologous H1-specific neutralizing antibodies in a reporter microneutralization assay.
Geometric mean fold rise (GMFR) of homologous H1-specific neutralizing antibodies in a viral microneutralization assay.
+3 more

Trial Design

5Treatment groups
Experimental Treatment
Active Control
Group I: Arm 4, Optimal DoseExperimental Treatment2 Interventions
10 healthy adult volunteer subjects from 18-49 years of age will receive the selected optimal dose of the H1ssF_3928 mRNA Vaccine, administered intramuscularly once. The optimal dosing group will be selected based on safety outcomes from the 10 mcg, 25 mcg, and 50 mcg dosing groups. For the optimal dose, the highest dose with no identified safety concerns as determined by the Safety Review Committee (SRC) will be selected. N =10
Group II: Arm 3, High DoseExperimental Treatment2 Interventions
10 healthy adult volunteer subjects from 18-49 years of age are split into two subgroups. The sentinel subgroup includes 2 vaccine recipients who will receive 50 mcg of the H1ssF_3928 mRNA Vaccine, administered intramuscularly once. The sentinel subgroup is observed for 8 days to monitor any early vaccine related adverse events. After the observation period, the remaining participants will receive the same dosage, 50 mcg of the H1ssF 3928 mRNA vaccine administered intramuscularly once. N = 10
Group III: Arm 2, Medium DoseExperimental Treatment2 Interventions
10 healthy adult volunteer subjects from 18-49 years of age are split into two subgroups. The sentinel subgroup includes 2 vaccine recipients who will receive 25 mcg of the H1ssF_3928 mRNA Vaccine, administered intramuscularly once. The sentinel subgroup is observed for 8 days to monitor any early vaccine related adverse events. After the observation period, the remaining participants will receive the same dosage, 25 mcg of the H1ssF 3928 mRNA vaccine administered intramuscularly once. N = 10
Group IV: Arm 1, Low DoseExperimental Treatment2 Interventions
10 healthy adult volunteer subjects from 18-49 years of age are split into two subgroups. The sentinel subgroup includes 2 vaccine recipients who will receive 10 mcg of the H1ssF_3928 mRNA Vaccine, administered intramuscularly once. The sentinel subgroup is observed for 8 days to monitor any early vaccine related adverse events. After the observation period, the remaining participants will receive the same dosage, 10 mcg of the H1ssF 3928 mRNA vaccine administered intramuscularly once. N = 10
Group V: Arm 5, IIV4Active Control1 Intervention
10 healthy adult volunteer subjects from 18-49 years of age will receive licensed Quadrivalent Influenza Vaccine (IIV4), administered intramuscularly once. Subjects receiving IIV4 will be followed for safety, but only their immune responses will be compared to those of participants receiving H1ssF_3928 mRNA Vaccine. N=10
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
VRC-FLUNPF099-00-VP (H1ssF_3928)
2019
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
3,269 Previous Clinical Trials
5,481,437 Total Patients Enrolled

Media Library

VRC H1ssF-3928 mRNA-LNP (mRNA Vaccine) Clinical Trial Eligibility Overview. Trial Name: NCT05755620 — Phase 1
Influenza Research Study Groups: Arm 5, IIV4, Arm 4, Optimal Dose, Arm 3, High Dose, Arm 1, Low Dose, Arm 2, Medium Dose
Influenza Clinical Trial 2023: VRC H1ssF-3928 mRNA-LNP Highlights & Side Effects. Trial Name: NCT05755620 — Phase 1
VRC H1ssF-3928 mRNA-LNP (mRNA Vaccine) 2023 Treatment Timeline for Medical Study. Trial Name: NCT05755620 — Phase 1

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Does this research study permit the participation of individuals aged 45 and above?

"This medical experiment is searching for participants between the ages of 18 and 49."

Answered by AI

Is enrollment open for this research project?

"Inclusion criteria for this study necessitate that potential participants have a diagnosis of influenza and fall between 18 to 49 years old. Approximately 50 subjects are required for the trial."

Answered by AI

Has the Low Dose protocol from Arm 1 been accepted by federal regulators?

"The power team assigned a score of 1 to Arm 1, Low Dose for its safety profile; this rating reflects the fact that Phase 1 trials provide limited data on both efficacy and safety."

Answered by AI

Is it possible for new participants to join this examination?

"As per records on clinicaltrials.gov, this trail is currently not registering participants. Initially posted on March 15th 2023 and last updated February 23rd 2023, the trial has ceased recruiting patients but there are 65 other trials that are still actively accepting volunteers."

Answered by AI
~27 spots leftby Aug 2025