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 | 113309 | 5.3 | 381413 | 2.3 | 655540 | 1.2 | 380774 | 0.8 | 547068 | 0.6 |
| 202541 | 114156 | 5.3 | 371451 | 2.3 | 639146 | 1.2 | 375054 | 0.8 | 541168 | 0.6 |
| 202542 | 113416 | 5.7 | 364074 | 2.4 | 632044 | 1.3 | 371734 | 0.8 | 540339 | 0.6 |
| 202543 | 113960 | 5.9 | 367759 | 2.5 | 632132 | 1.3 | 370519 | 0.9 | 541702 | 0.6 |
| 202544 | 108531 | 6.3 | 350517 | 2.8 | 607734 | 1.4 | 357763 | 0.9 | 526631 | 0.6 |