Respiratory Virus Hospitalizations — Great Lakes & Upper Midwest
Monthly combined hospitalizations (influenza + COVID-19 + RSV) per 100,000 residents
Data Quality Notes
- Solid line: Complete mandatory reporting
- Dotted line segments: Voluntary reporting period (May–October 2024), data may be incomplete
- RSV data: Prior to November 2024 represents voluntary reporting only
- Influenza data: Prior to 2025–26 season was collected October–April only; summer months show near-zero values as expected
Upper Midwest 2025-2026 Respiratory Disease Season