U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet):
Percentage of Visits for ILI by Age Group Reported by A Subset of ILINet Providers
2023-2024 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 |
| 202340 | 117874 | 7.6 | 359871 | 3.5 | 566952 | 1.6 | 322865 | 1.1 | 425431 | 0.9 |
| 202341 | 120032 | 8.1 | 351845 | 3.6 | 567637 | 1.8 | 327799 | 1.2 | 432365 | 0.9 |
| 202342 | 120898 | 8.7 | 354821 | 3.9 | 563581 | 1.8 | 323345 | 1.3 | 432441 | 1.1 |
| 202343 | 126591 | 9.0 | 362310 | 4.2 | 567767 | 2.0 | 326621 | 1.4 | 435395 | 1.2 |
| 202344 | 126964 | 9.4 | 361084 | 4.7 | 554788 | 2.2 | 317375 | 1.5 | 424262 | 1.3 |
| 202345 | 138482 | 10.4 | 372008 | 5.4 | 575356 | 2.5 | 328515 | 1.7 | 435228 | 1.4 |
| 202346 | 136644 | 10.9 | 362259 | 5.7 | 563410 | 2.8 | 320758 | 1.9 | 431560 | 1.5 |
| 202347 | 138034 | 11.1 | 311948 | 5.9 | 512775 | 2.9 | 291670 | 2.1 | 403056 | 1.6 |
| 202348 | 140830 | 11.0 | 361887 | 5.7 | 594910 | 3.5 | 336045 | 2.5 | 456510 | 1.9 |
| 202349 | 136858 | 11.7 | 374253 | 6.9 | 588173 | 3.6 | 338160 | 2.6 | 452675 | 1.9 |
| 202350 | 141503 | 12.8 | 380126 | 8.7 | 587249 | 4.3 | 335039 | 3.1 | 446292 | 2.2 |
| 202351 | 148362 | 14.1 | 367975 | 10.3 | 592073 | 5.5 | 337075 | 4.0 | 455714 | 2.8 |
| 202352 | 144740 | 15.5 | 304088 | 9.8 | 559762 | 6.5 | 324226 | 4.9 | 464751 | 3.6 |
| 202401 | 129656 | 13.6 | 315315 | 7.3 | 604618 | 5.8 | 341218 | 4.5 | 461163 | 3.3 |
| 202402 | 110601 | 11.4 | 319162 | 6.6 | 588169 | 4.6 | 341723 | 3.6 | 458309 | 2.6 |
| 202403 | 104236 | 10.5 | 298645 | 6.4 | 542496 | 4.0 | 310750 | 3.0 | 412322 | 2.2 |
| 202404 | 105995 | 10.2 | 332504 | 6.6 | 574209 | 3.9 | 329531 | 2.7 | 433828 | 1.9 |
| 202405 | 111643 | 10.3 | 356882 | 6.9 | 581043 | 3.7 | 328048 | 2.5 | 435563 | 1.8 |
| 202406 | 116829 | 10.4 | 370069 | 7.3 | 589578 | 3.8 | 334703 | 2.5 | 442984 | 1.7 |
| 202407 | 115394 | 10.2 | 355504 | 7.2 | 579511 | 3.8 | 326630 | 2.5 | 433689 | 1.7 |
| 202408 | 117750 | 10.4 | 355616 | 7.2 | 577792 | 4.0 | 325843 | 2.6 | 431954 | 1.8 |
| 202409 | 119258 | 10.1 | 370276 | 6.7 | 597147 | 3.8 | 335232 | 2.5 | 448848 | 1.7 |
| 202410 | 117164 | 9.8 | 361849 | 6.3 | 587127 | 3.4 | 332067 | 2.2 | 443159 | 1.6 |
| 202411 | 118026 | 9.3 | 354616 | 5.7 | 578116 | 3.1 | 327081 | 1.9 | 440515 | 1.4 |
| 202412 | 116960 | 9.0 | 350837 | 5.1 | 581848 | 2.8 | 329057 | 1.8 | 439709 | 1.3 |
| 202413 | 115458 | 8.6 | 331234 | 4.8 | 571148 | 2.8 | 323385 | 1.8 | 436538 | 1.3 |
| 202414 | 113597 | 8.5 | 327871 | 4.2 | 571334 | 2.6 | 321277 | 1.7 | 431777 | 1.2 |
| 202415 | 113825 | 8.1 | 341949 | 3.9 | 577245 | 2.3 | 328329 | 1.5 | 444672 | 1.1 |
| 202416 | 112116 | 7.3 | 354074 | 3.5 | 581649 | 2.0 | 331830 | 1.3 | 449551 | 1.0 |
| 202417 | 110615 | 7.1 | 353543 | 3.5 | 573163 | 1.9 | 325350 | 1.3 | 437785 | 0.9 |
| 202418 | 111247 | 7.0 | 357760 | 3.4 | 577433 | 1.8 | 326895 | 1.2 | 443620 | 0.9 |
| 202419 | 108247 | 6.6 | 349251 | 3.2 | 575859 | 1.7 | 327669 | 1.2 | 442485 | 0.8 |
| 202420 | 106947 | 6.5 | 338636 | 3.2 | 568436 | 1.7 | 321671 | 1.2 | 436359 | 0.9 |
| 202421 | 105412 | 6.1 | 327625 | 3.0 | 563636 | 1.6 | 321948 | 1.2 | 438967 | 0.8 |