High-Dose Influenza Vaccine Effectiveness against Hospitalization in Older Adults

N Niklas Dyrby Johansen (Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen) D Daniel Modin (Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen) M Matthew M. Loiacono (Sanofi, Morristown, NJ) R Rebecca C. Harris (Sanofi, Singapore) M Marine Dufournet (Sanofi, Lyon, France) C Carsten Schade Larsen (Department of Clinical Medicine–Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark) L Lykke Larsen (Research Unit for Infectious Diseases, Odense University Hospital, Odense, Denmark) L Lothar Wiese (Department of Infectious Diseases, Zealand University Hospital, Roskilde, Denmark) M Michael Dalager-Pedersen (Department of Infectious Diseases, Aalborg University Hospital, Aalborg, Denmark) B Brian L. Claggett (Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston) K Kira Hyldekær Janstrup (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) K Katja Vu Bartholdy (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) K Katrine Feldballe Bernholm (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) J Julie Inge-Marie Helene Borchsenius (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) F Filip Soeskov Davidovski (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) L Lise Witten Davodian (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) M Maria Dons (Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen) L Lisa Steen Duus (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) C Caroline Espersen (Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen) F Frederik Holme Fussing (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) A Anne Marie Reimer Jensen (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) N Nino Emanuel Landler (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) A Adam Cadovius Femerling Langhoff (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) M Mats Christian Højbjerg Lassen (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) A Anne Bjerg Nielsen (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) C Camilla Ikast Ottosen (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) M Morten Sengeløv (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) K Kristoffer Grundtvig Skaarup (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) S Scott D. Solomon (Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston) M Martin J. Landray (Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom) G Gunnar H. Gislason (Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen) L Lars Køber (Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen) L Line Ralfkiaer (Sanofi, Copenhagen) J Joshua Nealon (Sanofi, Boston) P Pradeesh Sivapalan (Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen) C Cyril Jean-Marie Martel (Statens Serum Institut, Copenhagen) J Jens Ulrik Stæhr Jensen (Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen) T Tor Biering-Sørensen (Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen)

Article Details

Volume / Issue Vol. 393, Issue 23
Published December 11, 2025
Pages 2291-2302
ISSN 0028-4793
Publisher Massachusetts Medical Society

Journal Info

New England Journal of Medicine

Massachusetts Medical Society

ISSN: 0028-4793 Social Sciences

Authors (38)

N

Niklas Dyrby Johansen

Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen

D

Daniel Modin

Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen

M

Matthew M. Loiacono

Sanofi, Morristown, NJ

R

Rebecca C. Harris

Sanofi, Singapore

M

Marine Dufournet

Sanofi, Lyon, France

C

Carsten Schade Larsen

Department of Clinical Medicine–Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark

L

Lykke Larsen

Research Unit for Infectious Diseases, Odense University Hospital, Odense, Denmark

L

Lothar Wiese

Department of Infectious Diseases, Zealand University Hospital, Roskilde, Denmark

M

Michael Dalager-Pedersen

Department of Infectious Diseases, Aalborg University Hospital, Aalborg, Denmark

B

Brian L. Claggett

Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston

K

Kira Hyldekær Janstrup

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

K

Katja Vu Bartholdy

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

K

Katrine Feldballe Bernholm

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

J

Julie Inge-Marie Helene Borchsenius

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

F

Filip Soeskov Davidovski

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

L

Lise Witten Davodian

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

M

Maria Dons

Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen

L

Lisa Steen Duus

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

C

Caroline Espersen

Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen

F

Frederik Holme Fussing

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

A

Anne Marie Reimer Jensen

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

N

Nino Emanuel Landler

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

A

Adam Cadovius Femerling Langhoff

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

M

Mats Christian Højbjerg Lassen

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

A

Anne Bjerg Nielsen

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

C

Camilla Ikast Ottosen

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

M

Morten Sengeløv

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

K

Kristoffer Grundtvig Skaarup

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

S

Scott D. Solomon

Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston

M

Martin J. Landray

Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom

G

Gunnar H. Gislason

Department of Cardiology, Copenhagen University Hospital — Herlev and Gentofte, Copenhagen

L

Lars Køber

Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen

L

Line Ralfkiaer

Sanofi, Copenhagen

J

Joshua Nealon

Sanofi, Boston

P

Pradeesh Sivapalan

Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen

C

Cyril Jean-Marie Martel

Statens Serum Institut, Copenhagen

J

Jens Ulrik Stæhr Jensen

Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen

T

Tor Biering-Sørensen

Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Copenhagen