Burden of respiratory syncytial virus (RSV) vs. influenza (A/B) in adults ≥ 50 years: a Pre-COVID-19 multicenter retrospective study - Benjamin Davido; Elyanne Gault; Djillali Annane; Sebastien Beaune; Jennifer Dumoulin; Pierre de Truchis; Azzam Saleh-Mghir; Karim Jaffal; Benoit Lemarié (European Journal of Clinical Microbiology & Infectious Diseases, 2026)