228 - Real-world Abrysvo Vaccine Effectiveness (VE) against Respiratory Syncytial Virus (RSV)-related Lower Respiratory Tract Disease (LRTD) Hospitalizations and Emergency Department Admissions over Two RSV Seasons—Kaiser Permanente of Southern California (KPSC), October 2023–April 2025

Presenting Author(s)

• 

  Sara Y. Tartof, PhD, MPH

  Epidemiologist/Research Scientist III
  Kaiser Permanente Southern California
  Pasedena, CA, United States

  Slides

Co-Author(s)

• NA

  Negar Aliabadi, MD, MS

  Director
  Pfizer
  New York, NY, United States
• GG

  Gabriella Goodwin, MS

  Kaiser Permanente, Southern California
  Pasadena, California, United States
• JS

  Jeff Slezak, MS

  Research Scientist Biostatistician
  Kaiser Permanente Southern California
  Pasadena, California, United States
• VH

  Vennis Hong, MPH

  Kaiser Permanente Southern California
  Pasadena, California, United States
• 

  Bradley Ackerson, MD (he/him/his)

  Co-Investigator
  Kaiser Permanente Southern California
  Pasadena, California, United States
• QL

  Qing Liu, M.S.

  Pfizer Inc.
  Collegeville, Pennsylvania, United States
• SS

  Sally Shaw, DrPH, MPH

  Kaiser Permanente Southern California
  Pasadena, California, United States
• SW

  Sabrina Welsh, MPH

  Director, Clinical Scientist
  Pfizer, Inc
  Collegeville, Pennsylvania, United States
• BK

  Banshri Kapadia, MS

  Kaiser Permanente Southern California
  Pasadena, California, United States
• BS

  Brigitte Spence, MPH

  Kaiser Permanente Southern California
  Pasadena, California, United States
• GD

  Gregg S. Davis, PhD

  Kaiser Permanente Southern California
  Pasadena, California, United States
• 

  Joseph Lewnard, PhD

  Assistant Professor of Epidemiology
  University of California
  Berkeley, CA, United States
• HC

  Hina Chowdhry, MPH

  Kaiser Permanente
  Fountain Valley, California, United States
• TF

  Timothy B. Frankland, MA

  KP Center for Integrated Health Care Research (CIHR)
  Honolulu, Hawaii, United States
• MA

  Michael Aragones, MD

  Kaiser Permanente Southern California
  Pasadena, California, United States
• MD

  Michael p. Dutro, PharmD

  Vaccines Medical Director
  Pfizer, Inc
  Albuquerque, New Mexico, United States
• EC

  Erica Chilson, PharmD

  Senior Director, US Medical Affairs
  Pfizer
  500 Arcola Road, Pennsylvania, United States
• EZ

  Evan Zasowski, PharmD

  Global Scientific Affairs Director, COVID & Flu
  Pfizer
  New York, New York, United States
• LJ

  Luis Jodar, PhD

  Pfizer
  New York, New York, United States
• BG

  Bradford D. Gessner, MD, MPH

  Sole Proprietor
  EpiVac Consulting
  Anchorage, Alaska, United States
• 

  Elizabeth Begier, MD, M.P.H.

  Senior Director, Scientific Affairs Lead, RSV Antiviral/Adult Vaccine Program
  Pfizer Vaccines
  Dublin, Dublin, Ireland