Number of Influenza cases in the U.S. in 2023, by week and subtype

Number of specimens testing positive for influenza in the United States in 2023, by week and subtype/lineage

CharacteristicA (H1N1)A (H3)A (Not subtyped)B (Victoria)B (Yamagata)B (Not determined)
52 1,190 292 280 229 0 21
51 1,209 321 314 267 0 34
50 991 280 424 292 0 81
49 968 271 244 261 0 52
48 706 176 173 219 0 24
47 579 124 139 140 0 27
46 486 103 149 142 0 43
45 479 61 115 130 0 32
44 290 41 64 89 0 14
43 239 36 49 68 0 14
42 276 26 34 73 0 11
41 212 22 13 68 0 5
40 176 16 10 48 0 3
Created with Highcharts 7.2.2Number of positive casesA (H1N1)A (H3)A (Not subtyped)B (Victoria)B (Yamagata)B (Not determined)12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152
05001,0001,5002,0002,500
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Release date

April 2024

Region

United States

Survey time period

2023

Supplementary notes

Data was obtained from sentinel surveillance systems.
Release date is date figures were accessed.

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Statistics on " Influenza in the U.S. "

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