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Flu's secret allies: study reveals how infection reshapes nose bacteria

NCT ID NCT02597647

Knowledge-focused Sponsor: University of California, Los Angeles 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study looked at how the flu virus changes the types of bacteria living in the nose and throat, and how the body's immune system reacts. Researchers gave 17 healthy adults either a flu vaccine nasal spray or a saltwater mist, then tracked bacterial changes and immune responses over time. The goal was to better understand the link between flu infection and our natural microbiome, not to test a new treatment.

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.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

17 people

The number who actually took part.

Start date

Feb 2011

Finished

Apr 2014

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Ages

18 to 64 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Healthy volunteers: * Healthy subjects between the ages of 18 and 65. Approximately half of the subjects will be female and approximately half will be male. * Must be eligible to receive live-attenuated nasal version of the influenza vaccine. * Must be able to provide signed and dated informed consent. * Healthy subjects willing and able to provide oropharyngeal and nasal cavity specimens Exclusion Criteria: * Immunosuppressive conditions or medications * chronic systemic medical illness * infections or antibiotic use within the past 60 days

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Conditions

The condition(s) this trial relates to.

influenza

As listed by the trial registrant

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

Influenza

Contacts and locations

Locations

  • UCLA

    Los Angeles, California, 90095, United States

More trials for these conditions

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