ClinicalTrials.gov record

Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Evaluation of Anti-Hemagglutinin (Anti-HA) Antibodies as Protection From the Flu in Healthy People

ClinicalTrials.gov ID: NCT01971255

Public ClinicalTrials.gov record NCT01971255. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

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ClinicalTrials.gov public records Last synced Jun 26, 2026, 1:00 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

Evaluation of Anti-Hemagglutinin Antibodies as a Correlate of Protection in an H1N1 Influenza Healthy Human Challenge Model

Study identification

NCT ID: NCT01971255
Recruitment status: Completed
Study type: Interventional
Phase: Phase 1, Phase 2
Lead sponsor: National Institute of Allergy and Infectious Diseases (NIAID); NIH
Enrollment: 74 participants

Conditions and interventions

Conditions

Influenza

Interventions

Ca/04/2009/H1N1r Challenge Virus Biological

Biological

Eligibility (public fields only)

Age range: 18 Years to 50 Years
Sex: All
Healthy volunteers: Accepts healthy volunteers

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: Aug 31, 2013
Primary completion: Aug 31, 2015
Completion: Aug 31, 2015
Last update posted: Apr 23, 2017

2013 – 2015

United States locations

U.S. sites: 1
U.S. states: 1
U.S. cities: 1

Facility	City	State	ZIP	Site status
National Institutes of Health Clinical Center, 9000 Rockville Pike	Bethesda	Maryland	20892	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT01971255, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Apr 23, 2017 · Synced Jun 26, 2026

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The complete protocol, eligibility criteria, and contact information for NCT01971255 live on ClinicalTrials.gov.

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