Hospital-acquired respiratory viral infections while applying droplet precautions on-site (DroPS) - prospective observation during the 2019/20 influenza season, Bern, Switzerland.

Single room isolation for respiratory viral infections (RVI), like influenza, puts hospitals under pressure. During the influenza season 2019/20, we implemented (DroPS) for RVI in two acute care hospitals and prospectively assessed the rate of hospital-acquired RVI (HARVI). 318 patients were admitted with RVI, 85 had Influenza or RSV, 75 stayed in multi-bed rooms with DroPS. From 764 patients , hospitalised ≥ three days in a multi-bed room 11 (1.4%) developed a clinical HARVI, and three tested positive (3/764, 0.4%; 2x RSV, 1x influenza). DroPS may represent an alternative strategy to deal with respiratory viral infections.