Age and Response to Flu Vaccines
Public ClinicalTrials.gov record NCT03328325. 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.
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 the Effects of Age, Prior Exposure, and Previous Vaccination on the B Cell Response to Inactivated Influenza Vaccine in Healthy Adults and Children
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The study will be designed as a prospective surveillance of the immune response to seasonal influenza vaccination in 240 healthy children and adults ages 9 and over. Study duration will be 5 years, with a participant duration of 6 months. Subjects will receive a quadrivalent inactivated influenza vaccine, at a dose of not less than 15 ug of hemagglutinin (HA), by intramuscular injection in open label fashion on day 0. Blood draws will occur at baseline, day 7, 28 and 90. The primary objective of this study is to evaluate the relationship between first influenza A virus exposure (inferred by age), vaccine history, and baseline serum antibody response to seasonal influenza vaccine in healthy adults and children.
Study identification
- NCT ID
- NCT03328325
- Recruitment status
- Terminated
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 152 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 9 Years to 99 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
- Dec 13, 2017
- Primary completion
- Feb 8, 2020
- Completion
- Apr 19, 2020
- Last update posted
- Aug 27, 2026
2017 – 2020
United States locations
- U.S. sites
- 2
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Rochester General Hospital - Infectious Disease Unit | Rochester | New York | 14621-3001 | — |
| University of Rochester Medical Center - Strong Memorial Hospital - Infectious Diseases | Rochester | New York | 14642-0001 | — |
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 NCT03328325, 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 Aug 27, 2026 · Synced Sep 3, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03328325 live on ClinicalTrials.gov.