Open access
Influenza Vaccination Effectiveness in Preventing Hospitalization of Adults With Underlying Medical Conditions: A Multicentre Case–Control Study
Diana Toledo
N. Soldevila
J. Galán
Pere Godoy
M. Morales-Suárez-Varela
M. Rodriguez-Suarez
María Grau
T. Fernández-Villa
Á. Morillo
G. Navarro
J. Chamorro
Ángela Domínguez
R. Valencia
M. A. Fernández-Sierra
María Mar Rodríguez
José Antonio Marín
G. Rubiera
V. Martín
G. López-Muñíz
C. F. M. de Septien
S. Fernandez
N. Torner
Carles Vilaplana
L. Forcadell
C. Rius
Anna Vilella
S. Simó-Nebot
E. D. del Amo
Magda Campins
Xavier Martínez
J. A. Rodrigo
J. Martínez
Ramón Boixeda
Julia Jaumandreu
J. Astray
C. Prados-Sánchez
A. Mangas-Moro
Amaranta McGee-Laso
L. Moreno-Galarraga
Nerea Díaz-Sánchez
Idaira Fernandez-Rodriguez
Cristina Llonch
I. Casado
Fernando Baigorria-Feltrin
A. Gasque
Sara Marquínez-Noriega
Mikel Egurrola-Izquierdo
P. García
I. Peraita-Costa
F. Sanz
Medicine
Abstract
Seasonal influenza, especially in persons with underlying medical conditions, is a substantial global burden. Influenza vaccination effectiveness (VE) varies annually, requiring continuous evaluation due to evolving viruses and vaccination coverages. Our aim was to investigate influenza VE in preventing hospitalization for confirmed influenza among people aged 15–64 years with underlying medical conditions.