U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet):
Percentage of Visits for ILI by Age Group Reported by A Subset of ILINet Providers
2021-2022 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 |
| 202140 | 108323 | 8.5 | 303420 | 3.0 | 448432 | 1.2 | 247253 | 0.9 | 287024 | 0.6 |
| 202141 | 107553 | 8.5 | 294668 | 2.8 | 444455 | 1.1 | 244888 | 0.8 | 288600 | 0.6 |
| 202142 | 104558 | 8.4 | 283900 | 2.7 | 420342 | 1.1 | 233846 | 0.9 | 278706 | 0.6 |
| 202143 | 106937 | 8.3 | 283838 | 2.8 | 428050 | 1.1 | 238258 | 0.8 | 287379 | 0.6 |
| 202144 | 104930 | 8.7 | 285387 | 3.2 | 414408 | 1.2 | 230859 | 0.9 | 278556 | 0.6 |
| 202145 | 111667 | 9.0 | 292405 | 3.4 | 429982 | 1.3 | 240221 | 1.0 | 287818 | 0.7 |
| 202146 | 111903 | 9.1 | 293049 | 3.5 | 437039 | 1.4 | 244035 | 1.0 | 292044 | 0.7 |
| 202147 | 109051 | 9.5 | 243153 | 3.7 | 401587 | 1.5 | 227630 | 1.2 | 282559 | 0.8 |
| 202148 | 112097 | 9.3 | 293531 | 3.8 | 454197 | 1.8 | 253321 | 1.4 | 306444 | 0.9 |
| 202149 | 108173 | 9.5 | 293602 | 4.3 | 447130 | 1.8 | 251350 | 1.3 | 297073 | 0.9 |
| 202150 | 112763 | 10.0 | 298095 | 5.1 | 456460 | 2.1 | 252100 | 1.4 | 298153 | 0.9 |
| 202151 | 114567 | 11.0 | 276602 | 6.2 | 461322 | 3.4 | 245174 | 2.2 | 286155 | 1.3 |
| 202152 | 132274 | 12.4 | 315350 | 6.5 | 569134 | 4.8 | 286026 | 3.3 | 315550 | 2.0 |
| 202201 | 111945 | 10.5 | 309155 | 5.5 | 540558 | 4.1 | 274983 | 3.0 | 305795 | 1.8 |
| 202202 | 95421 | 8.8 | 281382 | 4.8 | 479534 | 3.1 | 253533 | 2.3 | 291666 | 1.5 |
| 202203 | 84739 | 7.9 | 241318 | 3.7 | 433234 | 2.4 | 235951 | 1.8 | 280203 | 1.1 |
| 202204 | 77179 | 6.6 | 230928 | 2.6 | 404132 | 1.7 | 226987 | 1.3 | 274130 | 0.8 |
| 202205 | 74817 | 5.8 | 221456 | 2.3 | 381406 | 1.1 | 217449 | 0.9 | 268303 | 0.7 |
| 202206 | 77988 | 5.6 | 238191 | 2.0 | 394037 | 0.8 | 227778 | 0.7 | 283246 | 0.5 |
| 202207 | 84832 | 5.6 | 240806 | 2.2 | 387507 | 0.8 | 224162 | 0.6 | 276949 | 0.4 |
| 202208 | 86245 | 5.8 | 237946 | 2.3 | 386163 | 0.8 | 219983 | 0.5 | 273390 | 0.4 |
| 202209 | 89958 | 5.6 | 254806 | 2.4 | 396226 | 0.8 | 226874 | 0.5 | 283197 | 0.4 |
| 202210 | 93495 | 6.1 | 258572 | 2.7 | 399408 | 0.8 | 224854 | 0.5 | 275514 | 0.4 |
| 202211 | 97807 | 6.4 | 265250 | 3.0 | 411260 | 0.9 | 232668 | 0.6 | 290570 | 0.5 |
| 202212 | 96507 | 6.7 | 267453 | 3.0 | 414533 | 1.0 | 232968 | 0.7 | 286159 | 0.5 |
| 202213 | 98686 | 6.8 | 272199 | 3.2 | 417263 | 1.1 | 230407 | 0.7 | 285708 | 0.6 |
| 202214 | 100491 | 7.4 | 277060 | 3.6 | 423888 | 1.2 | 236011 | 0.7 | 290394 | 0.6 |
| 202215 | 102776 | 7.7 | 275605 | 3.9 | 423754 | 1.3 | 237033 | 0.8 | 294910 | 0.7 |