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 | 381836 | 2.3 | 655550 | 1.2 | 380779 | 0.8 | 547084 | 0.6 |
| 202541 | 114157 | 5.3 | 371460 | 2.3 | 639154 | 1.2 | 375058 | 0.8 | 541177 | 0.6 |
| 202542 | 113502 | 5.7 | 364373 | 2.4 | 632727 | 1.3 | 372170 | 0.8 | 540850 | 0.6 |
| 202543 | 114252 | 5.8 | 368540 | 2.5 | 633060 | 1.3 | 371043 | 0.9 | 542361 | 0.6 |
| 202544 | 112237 | 6.3 | 357388 | 2.8 | 613414 | 1.4 | 360695 | 0.9 | 530115 | 0.6 |
| 202545 | 120375 | 6.8 | 380652 | 3.4 | 631709 | 1.6 | 367484 | 1.0 | 537313 | 0.7 |
| 202546 | 119640 | 7.0 | 368963 | 3.7 | 629031 | 1.7 | 366710 | 1.1 | 536461 | 0.8 |
| 202547 | 120888 | 7.8 | 376035 | 4.3 | 637337 | 1.9 | 373120 | 1.2 | 547852 | 0.9 |
| 202548 | 117919 | 9.3 | 311854 | 5.3 | 558321 | 2.2 | 319690 | 1.5 | 478195 | 1.1 |
| 202549 | 119315 | 9.4 | 354501 | 5.3 | 636413 | 2.7 | 370763 | 1.8 | 547452 | 1.3 |
| 202550 | 121826 | 11.3 | 371731 | 7.8 | 632479 | 3.1 | 369112 | 2.0 | 546495 | 1.6 |
| 202551 | 138352 | 14.9 | 405214 | 12.1 | 650096 | 4.5 | 377118 | 2.9 | 556016 | 2.3 |
| 202552 | 153028 | 19.8 | 359146 | 15.1 | 594902 | 6.7 | 339077 | 4.7 | 509885 | 4.3 |