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Flu clinical trials in Philadelphia, PA

5 studies for Flu are looking for participants at sites in and around Philadelphia (within about 30 miles). Open a study to see who can join and how to contact the study team.

High vs.Standard Dose Influenza Vaccine in Pediatric Solid Organ Transplant (SOT) Recipients

RecruitingPhase 2
  • Children's Hospital of Philadelphia, Philadelphia
Ages 3 to 17 · All sexes · Updated Sep 24, 2026 · NCT05947071

A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age

RecruitingPhase 3Healthy volunteers welcome
  • GSK Investigational Site, Philadelphia
Ages 65 and older · All sexes · Updated Sep 18, 2026 · NCT07805707

Flu Infection at UPHS

RecruitingObservational study
  • Penn Presbyterian Medical Center, Philadelphia
Ages 18 and older · All sexes · Updated Jun 3, 2026 · NCT06807840

A Study to Learn About mRNA Vaccines Against Influenza in Adults

RecruitingPhase 2Healthy volunteers welcome
  • DM Clinical Research - Philadelphia, Philadelphia
Ages 18 and older · All sexes · Updated May 6, 2026 · NCT07431853

Characterization of Humoral and Cellular Immune Responses Elicited by Influenza Vaccination in Healthy Adults

RecruitingPhase 4Healthy volunteers welcome
  • University of Pennsylvania, Philadelphia
Ages 18 and older · All sexes · Updated Feb 9, 2026 · NCT05108818

About Flu

The flu can cause serious illness in people over 65, babies, and people with certain chronic illnesses. The best way to prevent the flu is to get a vaccine.

More about Flu on MedlinePlus

Flu trials in other cities

Other studies in Philadelphia

From ClinicalTrials.gov, data retrieved Sep 29, 2026. Each study sets its own eligibility; the study team decides who can join.