Table 1.
Estimated Influenza-Associated Illnesses, Medical Visits, Hospitalizations, and Deaths by Influenza Virus Type and Subtype and Age Group—United States, 2018–2019 Influenza Season
| Illnesses | Medical Visits | Hospitalizations | Deaths | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Influenza (Sub)type | Age Group | Estimate | 95% UIa | Estimate | 95% UI | Estimate | 95% UI | Estimate | 95% UI |
| Influenza A and B | 6 months–4 years | 2 993 292 | (2 064 327–5 813 928) | 2 005 506 | (1 376 651–3 905 571) | 20 868 | (14 391–40 532) | 219 | (53–739) |
| 5–17 years | 7 663 310 | (6 041 811–10 516 276) | 3 984 921 | (3 106 356–5 491 261) | 21 012 | (16 566–28 834) | 211 | (36–656) | |
| 18–49 years | 11 913 203 | (10 087 669–15 785 820) | 4 407 885 | (3 635 026–5 916 066) | 66 869 | (56 622–88 605) | 2450 | (1405–5803) | |
| 50–64 years | 9 238 038 | (6 523 213–16 327 079) | 3 972 356 | (2 788 157–7 021 296) | 97 967 | (69 176–173 144) | 5676 | (2 575–15 577) | |
| ≥65 years | 3 073 227 | (1 990 659–6 157 258) | 1 721 007 | (1 108 265–3 446 930) | 279 384 | (180 969–559 750) | 25 555 | (12 281–59 363) | |
| All ages | 34 881 071 | (30 804 737–44 394 276) | 16 091 676 | (14 130 851–20 561 197) | 486 100 | (384 310–778 363) | 34 110 | (20 753–69 071) | |
| Influenza A(H3N2) | 6 months–4 years | 1 219 060 | (829 889–2 371 609) | 816 770 | (551 737–1 592 697) | 6940 | (4 689–13 608) | 73 | (17–243) |
| 5–17 years | 4 469 055 | (3 536 287–6 111 279) | 2 323 909 | (1 828 242–3 174 928) | 10 278 | (8071–14 076) | 103 | (17–317) | |
| 18–49 years | 4 951 671 | (4 104 164–6 657 477) | 1 832 118 | (1 492 332–2 475 088) | 23 666 | (19 858–31 616) | 867 | (496–2027) | |
| 50–64 years | 3 577 415 | (2 460 247–6 310 877) | 1 538 289 | (1 058 070–2 719 926) | 33 656 | (23 609–59 649) | 1950 | (885–5325) | |
| ≥65 years | 1 520 099 | (974 217–3 100 136) | 851 255 | (543 215–1 733 422) | 157 983 | (102 336–316 414) | 14 450 | (6942–33 420) | |
| All ages | 15 737 300 | (13 895 150–19 857 103) | 7 362 341 | (6 456 292–9 363 997) | 232 523 | (177 682–391 923) | 17 443 | (10 026–36 814) | |
| Influenza A(H1N1)pdm09 | 6 months–4 years | 1 530 699 | (1 036 024–2 969 043) | 1 025 568 | (692 562–1 994 583) | 12 714 | (8 825–24 712) | 134 | (31–441) |
| 5–17 years | 2 681 433 | (2 095 593–3 672 515) | 1 394 345 | (1 087 731–1 917 653) | 9604 | (7555–13 152) | 96 | (16–294) | |
| 18–49 years | 6 235 437 | (5 217 709–8 365 654) | 2 307 112 | (1 887 793–3 112 738) | 40 085 | (33 849–53 304) | 1468 | (841–3441) | |
| 50–64 years | 5 192 363 | (3 656 638–9 215 958) | 2 232 716 | (1 566 427–3 951 761) | 60 584 | (42 749–106 916) | 3510 | (1590–9626) | |
| ≥65 years | 1 417 235 | (893 272–2 856 660) | 793 652 | (498 055–1 584 752) | 108 535 | (70 316–218 063) | 9927 | (4760–22 981) | |
| All ages | 17 057 167 | (14 955 238–22 119 540) | 7 753 393 | (6 763 274–10 115 308) | 231 522 | (188 659–349 338) | 15 136 | (9678–29 640) | |
| Influenza B | 6 months–4 years | 94 129 | (38 740–21 2737) | 63 066 | (26 190–143 306) | 859 | (517–1745) | 9 | (2–30) |
| 5–17 years | 241 037 | (150 833–372 312) | 125 339 | (77 879–192 990) | 916 | (625–1358) | 9 | (1–28) | |
| 18–49 years | 217 659 | (112 960–357 679) | 80 534 | (41 347–132 284) | 2 710 | (2116–3690) | 99 | (55–237) | |
| 50–64 years | 146 304 | (46 017–320 285) | 62 911 | (19 616–138 411) | 3328 | (2247–5900) | 193 | (86–536) | |
| ≥65 years | 35 460 | (0–105 126) | 19 858 | (0–59 293) | 11 524 | (7396–23 360) | 1054 | (507–2440) | |
| All ages | 734 589 | (541 765–1 023 014) | 351 708 | (260 630–493 432) | 19 337 | (15 086–31 583) | 1364 | (816–2806) |
Abbreviation: UI, uncertainty interval.
a95% UI from 5000 Monte Carlo simulations.