Open-Label Influenza Vaccine Evaluation
Public ClinicalTrials.gov record NCT02872311. 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
Open-Label, Randomized Study of Immune Response to Licensed Influenza Vaccines in Adults 65-74 Years of Age (US Flu Vaccine Effectiveness Serologic Study, 2016-17 and 2017-18)
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is an open-label, randomized trial in up to 210 adults aged 65-74 years to evaluate the immune response to consecutive influenza vaccination across 2 seasons. Participants will be randomized to receive 1 of 3 licensed and recommended vaccines in the first year; 2 arms will receive the same vaccination in the second year and the third arm will be randomized again to 1 of 3 licensed vaccines. All participants will have pre and post-vaccination serum blood draws for a total of 6 draws over 18 months.
Study identification
- NCT ID
- NCT02872311
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 179 participants
Conditions and interventions
Conditions
Interventions
- High Dose Influenza vaccine Biological
- Adjuvanted Influenza vaccine Biological
- Standard Dose Influenza vaccine Biological
- Recombinant Influenza vaccine Biological
Biological
Eligibility (public fields only)
- Age range
- 65 Years to 74 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Sep 2016 (Type not available)
- Primary completion
- Apr 2018 (Actual)
- Completion
- Sep 2018 (Actual)
- Last update posted
- Dec 10, 2025
2016 – 2018
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Marshfield Clinic - Marshfield Center | Marshfield | Wisconsin | 54449 | — |
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 NCT02872311, 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 Dec 10, 2025 · Synced Oct 21, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT02872311 live on ClinicalTrials.gov.