Short-term and long-term risk of death and readmission among adults aged 50+ years admitted with severe acute respiratory infections due to COVID-19, influenza or RSV in Denmark, 2022-2025.

ABSTRACT:

Introduction

Respiratory infections due to COVID-19, influenza and respiratory syncytial virus (RSV) are common causes of morbidity and mortality among adults. We aimed to examine the incidence, severity and mortality of the three viruses among Danish hospitalised adults during three postpandemic years to evaluate the relative impact at population level.

Methods

We included individuals aged 50 years and older admitted with a severe acute respiratory infection (SARI) due to COVID-19, influenza A or RSV between 23 May 2022 and 18 May 2025. Patients were identified from the national surveillance system for SARI through a combination of relevant International Statistical Classification of Diseases and Related Health Problems-10th edition diagnosis codes combined with a positive

SUBMITTER: Lomholt FK 

PROVIDER: S-EPMC12829357 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature