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NIH scientists probe immune secrets behind flu vaccines

NCT ID NCT01191853

Knowledge-focused Sponsor: National Heart, Lung, and Blood Institute (NHLBI) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 18, 2026 · Updated 17 times

Summary

This study aimed to understand how the immune system responds to seasonal and H1N1 flu vaccines in healthy adults. Researchers collected blood and nasal samples from 203 NIH employees before and after vaccination. The goal was to analyze immune responses to improve future vaccines.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

203 people

The number who actually took part.

Start date

Sep 2009

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Healthy NIH Volunteers

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: 1. NIH employees scheduled to receive the Influenza and H1N1 vaccines through OMS. 2. Health status confirmed by History, Physical Exam and blood work through the CHI Screening Protocol. 3. Age 18 years and older (no upper limit). 4. Able to comprehend the investigational nature of the protocol and provide informed consent. EXCLUSION CRITERIA: 1. Recipient of another vaccine or immune modulating drug within 6 months prior to study entry. 2. Severe allergies to eggs or their products. 3. Prior severe reactions to vaccines. 4. Participation on any blood collection or blood donation procedure during study participation. 5. Current pregnancy (women of child bearing potential must have a negative serum pregnancy test done on screening within 1 week of protocol accrual).

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Conditions

The condition(s) this trial relates to.

influenza prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Healthy volunteers Influenza

Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.