[Correspondence] COVID-19 versus influenza burden in Denmark in the 2024–25 season

In our previous national cohort study in 6 million residents in Denmark, we showed that COVID-19 was still more widespread and severe than influenza in the 2022–23 and 2023–24 seasons.1 The incidence rate was twice as high for COVID-19 hospitalisations (incidence rate ratio [IRR] 2·04 [95% CI 1·38–3·02]) and three times as high for COVID-19 deaths (3·19 [95% CI 2·24–4·53]) relative to influenza. In addition, COVID-19 hospitalisation had a higher 30-day mortality risk than influenza hospitalisation (risk ratio [RR] 1·23 [95% CI 1·08–1·37]), with patients with comorbidities, those who were unvaccinated, and male patients particularly vulnerable.