Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.

NCT03816878 · ClinicalTrials.gov registry record · Phase 1

Immunogenicity and Safety Study of Inactivated Subunit H5N1 Influenza Vaccine in Prior Recipients of Live Attenuated H2N2, H6N1 and H9N2 Influenza Vaccines and in H5N1 and Live Attenuated Vaccine Naïve Individuals

A Phase 1 study, sponsored by National Institute of Allergy and Infectious Diseases (NIAID).

Completed
Registry status
Phase 1
Development phase
32
Enrollment target

NCT03816878: Completed Phase 1 study, sponsored by National Institute of Allergy and Infectious Diseases (NIAID).

NCT03816878 is a Phase 1 study that has completed, run by National Institute of Allergy and Infectious Diseases (NIAID). The registered enrollment target is 32 participants, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (47% lower). According to ClinicalTrials.gov, the official US trial registry.

View on ClinicalTrials.gov ↗

View your shortlist →

The verdict

NCT03816878, a Phase 1 study, has completed, sponsored by National Institute of Allergy and Infectious Diseases (NIAID).

COMPLETED
Registry status
Phase 1
Development phase
32 participants
Enrollment target

Study Summary

The purpose of this study is to evaluate the immunogenicity and safety of inactivated subunit H5N1 influenza vaccine in individuals who have previously received live attenuated H2N2, H6N1, or H9N2 influenza vaccine, as well as in individuals who have never previously received H5N1 or other pandemic live attenuated influenza vaccines.

Primary Outcome

As measured by enzyme-linked immunosorbent assay (ELISA) and microneutralization assay (MN) using the chimeric cH6/N1 probe

Interventions

  • BIOLOGICAL H5N1 pISV

Trial Details

FieldValue
Enrollment Target 32 participants
Start Date 2019-01-08
Est. Completion 2020-03-17
Phase Phase 1

What the finished NCT03816878 record still lists

NCT03816878 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 32 participants, a relatively small participant target, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (47% lower).

The record links to 0 conditions, and to 1 intervention - of which H5N1 pISV is the first listed.

NCT03816878 does not publish any study locations in the registry export this page uses.

Frequently Asked Questions

What is clinical trial NCT03816878 about?

NCT03816878 is a clinical study titled "Immunogenicity and Safety Study of Inactivated Subunit H5N1 Influenza Vaccine in Prior Recipients of Live Attenuated H2N2, H6N1 and H9N2 Influenza Vaccines and in H5N1 and Live Attenuated Vaccine Naïve Individuals". The purpose of this study is to evaluate the immunogenicity and safety of inactivated subunit H5N1 influenza vaccine in individuals who have previously received live attenuated H2N2, H6N1, or H9N2 influenza vaccine, as well as in individuals who have never previously received H5N1 or other pandemic ...

What is the current status of trial NCT03816878?

This trial is currently completed. It is a Phase 1 study. The enrollment target is 32 participants. The study started on 2019-01-08. Estimated completion is 2020-03-17.

What interventions are being tested in trial NCT03816878?

The interventions under investigation include: H5N1 pISV (BIOLOGICAL).

Who is sponsoring clinical trial NCT03816878?

This trial is sponsored by National Institute of Allergy and Infectious Diseases (NIAID), which has 2,006 total clinical trials registered on ClinicalTrials.gov.

How this trial's enrollment target compares

Where NCT03816878's enrollment target sits among peer trials

32 1296th of 2000 higher than 679 of 2,000 other Phase 1 trials

participants (enrollment target), bucketed by value

Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source ClinicalTrials.gov registry export · 2026-08-08

Nationwide trials with similar profiles

Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.

Similar enrollment target

  • NCT02445781 · 32 participants · Early Phase 1

    Differing Levels of Hypoglycemia

  • NCT02792270 · 32 participants · NA

    Caloric Restriction In Sarcoma Patients Treated With Pre-Operative RT

  • NCT03068910 · 32 participants · Early Phase 1

    Hyperandrogenemia and Altered Day-night LH Pulse Patterns

  • NCT03208868 · 32 participants · NA

    Leucine Enriched Essential Amino Acid Mixture to Reverse Muscle Loss in Cirrhosis

Similar registry start date

  • NCT05962346 · started 2026-12 · NA

    Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia

  • NCT07125183 · started 2026-12 · Phase 2

    Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma

  • NCT07292298 · started 2026-11 · Phase 2

    Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates

  • NCT04263285 · started 2026-10 · NA

    Treatment of Depression Post-SCI

Source: ClinicalTrials.gov NCT03816878, the US trial registry maintained by the National Library of Medicine. NCT03816878 (small enrollment · none site footprint · completed) retrieved and formatted by PlainTrial, see methodology.