Study of Immune Responses to Influenza Vaccination
Sponsor: University of Pennsylvania
Listed as NCT03346772, this PHASE4 trial focuses on Influenza Vaccination and remains actively recruiting participants. Sponsored by University of Pennsylvania, it has been updated 12 times since 2017, reflecting substantial change activity. This study is part of the global effort to build evidence for infectious disease interventions.
Status Flow
Change History
12 versions recorded-
Sep 2025 — Present [monthly]
Recruiting PHASE4
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Sep 2024 — Sep 2025 [monthly]
Recruiting PHASE4
-
Jul 2024 — Sep 2024 [monthly]
Recruiting PHASE4
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Nov 2023 — Jul 2024 [monthly]
Recruiting PHASE4
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Nov 2022 — Nov 2023 [monthly]
Recruiting PHASE4
▶ Show 7 earlier versions
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May 2021 — Nov 2022 [monthly]
Recruiting PHASE4
Status: Enrolling By Invitation → Recruiting
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Jan 2021 — May 2021 [monthly]
Enrolling By Invitation PHASE4
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Sep 2020 — Jan 2021 [monthly]
Enrolling By Invitation PHASE4
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Jul 2020 — Sep 2020 [monthly]
Enrolling By Invitation PHASE4
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Feb 2019 — Jul 2020 [monthly]
Enrolling By Invitation PHASE4
Status: Recruiting → Enrolling By Invitation
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Jun 2018 — Feb 2019 [monthly]
Recruiting PHASE4
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Dec 2017 — Jun 2018 [monthly]
Recruiting PHASE4
First recorded
Oct 2017
Trial started
Per CT.gov start date — pre-dates our first snapshot
Eligibility Summary
No eligibility information available.
Contact Information
- University of Pennsylvania
For direct contact, visit the study record on ClinicalTrials.gov .