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Influenza Vaccination clinical trials and research
As of November 12, 2026, Find a Trial lists 3 Influenza Vaccination clinical trials that are recruiting, at sites in 3 countries (most in Spain (1), Finland (1), South Korea (1)). By phase: Phase 4 (1). Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 3Clinical trials
- 3Countries
Newest Influenza Vaccination clinical trials
| Study | Phase | Where | Status | Registered |
|---|---|---|---|---|
| Influenza Vaccine Immunogenicity in Older Adults with Repeated Vaccination | Phase 4 | Seoul | Recruiting | Sep 24, 2026 |
| Offering the nasal flu vaccine in daycare for young children | — | Turku | Recruiting | Dec 30, 2025 |
| Evaluating the impact of influenza vaccination and certain medications on COVID-19 outcomes | — | Terrassa, Barcelona | Recruiting | Apr 29, 2020 |
All recruiting trials (3)
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Influenza Vaccine Immunogenicity in Older Adults with Repeated Vaccination
This study tests how different flu vaccines perform in adults 65+ who get yearly vaccines to see if age and repeated vaccination affect the immune response.
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Offering the nasal flu vaccine in daycare for young children
This project will test whether offering the nasal (spray) influenza vaccine at daycare gets more children vaccinated than offering the vaccine only at healthcare clinics.
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Evaluating the impact of influenza vaccination and certain medications on COVID-19 outcomes
This study is trying to see if getting the flu vaccine or taking certain medications helps people in the hospital recover better from COVID-19.
Related topics
Quick answers
How many Influenza Vaccination clinical trials are recruiting right now?
3, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 3 countries. The most sites are in Spain (1 trial), Finland (1 trial), South Korea (1 trial). Each study page lists its sites and which ones are recruiting.
What phases are they in?
Phase 4: 1. Trials with no phase listed are usually device, behavioural or observational studies.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.