U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet):
Percentage of Visits for ILI by Age Group Reported by A Subset of ILINet Providers
2025-2026 Season | 0-4 years | 5-24 years | 25-49 years | 50-64 years | 65+ years |
| Week | Total Visits | ILI | Total Visits | ILI | Total Visits | ILI | Total Visits | ILI | Total Visits | ILI |
| 202540 | 113310 | 5.3 | 381418 | 2.3 | 655549 | 1.2 | 380778 | 0.8 | 547083 | 0.6 |
| 202541 | 114157 | 5.3 | 371459 | 2.3 | 639152 | 1.2 | 375057 | 0.8 | 541176 | 0.6 |
| 202542 | 113502 | 5.7 | 364373 | 2.4 | 632726 | 1.3 | 372169 | 0.8 | 540848 | 0.6 |
| 202543 | 114252 | 5.8 | 368539 | 2.5 | 633055 | 1.3 | 371043 | 0.9 | 542360 | 0.6 |
| 202544 | 112236 | 6.3 | 357388 | 2.8 | 613408 | 1.4 | 360694 | 0.9 | 530112 | 0.6 |
| 202545 | 120375 | 6.8 | 380651 | 3.4 | 631700 | 1.6 | 367484 | 1.0 | 537308 | 0.7 |
| 202546 | 119529 | 7.0 | 368664 | 3.7 | 628323 | 1.7 | 366307 | 1.1 | 535993 | 0.8 |
| 202547 | 120643 | 7.8 | 374648 | 4.3 | 635549 | 1.9 | 372205 | 1.2 | 546821 | 0.9 |
| 202548 | 117243 | 9.2 | 308426 | 5.2 | 553693 | 2.1 | 317481 | 1.5 | 476003 | 1.1 |