Susan Pfeiffer, PA-C, MS

Director, Clinical Development, Infectious Disease
Moderna, Inc.
Cambridge, Massachusetts, United States

Susan Pfeiffer, MHS, PA-C, is Director of Clinical Development at Moderna. She earned her Physician Assistant Studies degree from Wake Forest University and a Master of Health Science in Clinical Research Administration from George Washington University. After beginning her career in clinical practice, she has spent the past 15 years focused on vaccine development. Since 2020, her work has centered on COVID-19 clinical trials in both adult and pediatric populations, advancing critical vaccines during the pandemic.

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Presentation(s):

• 407 - Cardiac Troponin I Levels Following mRNA-1273 Vaccination in Participants 12 Through 30 Years of Age: Results from a Phase 4 Randomized, Placebo-Controlled Study

  Tuesday, October 21, 2025
  1:57 PM - 2:09 PM US ET