Author

Ralf Duerrwald

3 papers indexed here

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Open access Oct 2026

Comparing two case definitions for including severe acute respiratory infection patients in influenza and COVID-19 vaccine effectiveness studies among older adults using the test-negative design: VEBIS hospital network, seven European countries, 2023/24.

INTRODUCTION Two severe acute respiratory infection (SARI) case definitions (CDs) are often used in test-negative design (TND) hospital-based vaccine effectiveness (VE) studies. SARI-CD1 requires ≥1 symptom (cough, fever, shortness of breath, anosmia, ageusia, or dysgeusia); SARI-CD2 requires both fever and cough. Usin...

Diogo F. P. Marques, Jennifer Howard, Marcos Lozano Álvarez et al. · Vaccine · 0 citations

Open access Oct 2026

Increased circulation of influenza A(H1N1)pdm09 viruses with reduced susceptibility to oseltamivir, Germany 2024-2026.

BACKGROUND Oseltamivir is still considered to be the first-line antiviral treatment for severe seasonal influenza. However, resistance to neuraminidase (NA) inhibitors poses significant challenges to influenza management. Since the 2023/24 season, A(H1N1)pdm09 viruses carrying neuraminidase substitutions (NA-I223V and/...

S. Duwe, Mohammad Naneh, Jeanette Milde et al. · International Journal of Med... · 0 citations

Open access Aug 2026

Association between influenza vaccination and severe outcomes in adults aged ≥ 65 years hospitalized with laboratory-confirmed influenza: a retrospective cohort study, I-MOVE hospital network, Europe, 2015/16-2024/25.

Vaccination showed little or no association with ICU admission, but was associated with a one-quarter reduction in IHD among hospitalized older adults, reinforcing its benefits against fatal in-hospital outcomes.

Diogo F. P. Marques, Angela M. C. Rose, S. Monge et al. · Expert Review of Vaccines · 0 citations