ISO week · all sample origins summed · via the WHO xMart interface
Licence: WHO terms (FluNet: licence not specified)
retrieved Nov 2, 2026 · SHA-256 0a1c58f3d4…
Respiratory · ICD-10 J09–J11
Seasonal influenza. WHO FluNet provides global laboratory detections; for the EU/EEA, ECDC ERVISS primary-care sentinel positivity is the main source from ISO week 40 of 2022.
countries/areas
127
Year
1995–2026
Window
Oct 26
Window: Sep 7 – Oct 26 (ISO week start dates)
Sources
2
Laboratory detections (sum of last 8 weeks)
Detections reflect both activity and testing volume, and testing strategies differ by country: do not use them to rank countries or infer risk.
Each dot is the peak week of one season: the lower it sits, the later the peak (the axis starts at the season start: July in the north, January in the south). The light band is the middle 50% of past peak weeks (inter-quartile range), the dashed line the median. Dot size and the number above it are laboratory detections in the peak week, comparable within a country only.
Data: WHO FluNet laboratory detections (influenza A+B), the same export as the seasonal fingerprint, up to Oct 26, 2026. Median and quartiles use finished seasons only, excluding the COVID-19 period (hollow dashed dots) and seasons peaking below 20 detections; the season in progress is marked, without a peak.
Median peak: ISO week 34 (Aug) · middle 50%: weeks 27–35
2025 peaked in week 30, 4 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011 | 34 | 134 | |
| 2012 | 28 | 439 | |
| 2013 | 35 | 159 | |
| 2014 | 34 | 320 | |
| 2015 | 34 | 251 | |
| 2016 | 35 | 611 | |
| 2017 | 36 | 960 | |
| 2018 | 37 | 252 | |
| 2019 | 26 | 1,002 | |
| 2020 | 4 | 113 | COVID-19 period, left out of the statistics |
| 2022 | 24 | 1,555 | |
| 2023 | 27 | 1,175 | |
| 2024 | 27 | 1,373 | |
| 2025 | 30 | 735 | |
| 2026 | – | – | in progress |
Median peak: ISO week 2 (Jan) · middle 50%: weeks 1–4
2025/26 peaked in week 49, 6 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 8 | 2,763 | |
| 2012/13 | 4 | 1,178 | |
| 2013/14 | 3 | 4,091 | |
| 2014/15 | 2 | 2,587 | |
| 2015/16 | 11 | 4,367 | |
| 2016/17 | 1 | 2,448 | |
| 2017/18 | 3 | 6,159 | |
| 2018/19 | 3 | 6,118 | |
| 2019/20 | 1 | 6,211 | |
| 2020/21 | 21 | 441 | COVID-19 period, left out of the statistics |
| 2021/22 | 2 | 3,209 | |
| 2022/23 | 10 | 14,995 | |
| 2023/24 | 49 | 17,746 | |
| 2024/25 | 2 | 10,163 | |
| 2025/26 | 49 | 14,624 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 6 (Feb) · middle 50%: weeks 1–8
2025/26 peaked in week 1, 5 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 9 | 1,012 | |
| 2012/13 | 6 | 1,358 | |
| 2013/14 | 8 | 872 | |
| 2014/15 | 7 | 2,511 | |
| 2015/16 | 11 | 1,574 | |
| 2016/17 | 52 | 2,266 | |
| 2017/18 | 1 | 2,418 | |
| 2018/19 | 6 | 4,533 | |
| 2019/20 | 6 | 2,213 | |
| 2020/21 | – | 4 | too low |
| 2021/22 | 13 | 2,337 | |
| 2022/23 | 51 | 6,584 | |
| 2023/24 | 5 | 3,768 | |
| 2024/25 | 1 | 4,752 | |
| 2025/26 | 1 | 4,142 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 6 (Feb) · middle 50%: weeks 5–10
2025/26 peaked in week 5, 1 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 10 | 81 | |
| 2012/13 | 5 | 210 | |
| 2013/14 | 12 | 45 | |
| 2014/15 | 7 | 204 | |
| 2015/16 | 10 | 157 | |
| 2016/17 | 6 | 203 | |
| 2017/18 | 9 | 292 | |
| 2018/19 | 6 | 140 | |
| 2019/20 | 5 | 130 | |
| 2021/22 | 18 | 42 | |
| 2022/23 | 48 | 250 | |
| 2023/24 | 5 | 229 | |
| 2024/25 | 8 | 216 | |
| 2025/26 | 5 | 124 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 3 (Jan) · middle 50%: week 51 – week 4 of the next year
2025/26 peaked in week 47, 9 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 3 | 962 | |
| 2012/13 | 4 | 818 | |
| 2013/14 | 4 | 1,009 | |
| 2014/15 | 2 | 611 | |
| 2015/16 | 5 | 815 | |
| 2016/17 | 3 | 739 | |
| 2017/18 | 3 | 920 | |
| 2018/19 | 4 | 878 | |
| 2019/20 | 51 | 607 | |
| 2022/23 | 5 | 251 | |
| 2023/24 | 48 | 377 | |
| 2024/25 | 50 | 472 | |
| 2025/26 | 47 | 631 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 8 (Feb) · middle 50%: weeks 4–10
2025/26 peaked in week 52, 9 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 13 | 1,105 | |
| 2012/13 | 9 | 3,388 | |
| 2013/14 | 12 | 1,132 | |
| 2014/15 | 8 | 1,321 | |
| 2015/16 | 5 | 4,509 | |
| 2016/17 | 3 | 1,536 | |
| 2017/18 | 13 | 1,834 | |
| 2018/19 | 8 | 2,509 | |
| 2019/20 | 7 | 2,029 | |
| 2021/22 | 51 | 1,331 | |
| 2022/23 | 51 | 3,382 | |
| 2023/24 | 5 | 2,564 | |
| 2024/25 | 10 | 3,772 | |
| 2025/26 | 52 | 2,484 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 24 (Jun) · middle 50%: weeks 23–32
2025 peaked in week 23, 1 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011 | 23 | 223 | |
| 2012 | 34 | 129 | |
| 2013 | 23 | 139 | |
| 2014 | 32 | 89 | |
| 2015 | 25 | 126 | |
| 2016 | 35 | 80 | |
| 2017 | 26 | 117 | |
| 2018 | 24 | 99 | |
| 2019 | 24 | 197 | |
| 2021 | 46 | 46 | COVID-19 period, left out of the statistics |
| 2022 | 36 | 88 | |
| 2023 | 22 | 173 | |
| 2024 | 20 | 120 | |
| 2025 | 23 | 56 | |
| 2026 | – | – | in progress |
Median peak: ISO week 3 (Jan) · middle 50%: week 51 – week 7 of the next year
2025/26 peaked in week 48, 8 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 3 | 308 | |
| 2012/13 | 8 | 184 | |
| 2013/14 | 8 | 205 | |
| 2014/15 | 7 | 144 | |
| 2015/16 | 7 | 116 | |
| 2016/17 | 51 | 149 | |
| 2017/18 | 3 | 201 | |
| 2018/19 | 51 | 160 | |
| 2019/20 | 4 | 137 | |
| 2022/23 | 1 | 87 | |
| 2023/24 | 50 | 199 | |
| 2024/25 | 2 | 293 | |
| 2025/26 | 48 | 223 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 4 (Jan) · middle 50%: week 52 – week 7 of the next year
2025/26 peaked in week 52, 5 weeks earlier than the median
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 11 | 2,646 | |
| 2012/13 | 2 | 6,897 | |
| 2013/14 | 1 | 4,982 | |
| 2014/15 | 52 | 13,747 | |
| 2015/16 | 10 | 11,971 | |
| 2016/17 | 7 | 15,356 | |
| 2017/18 | 5 | 26,386 | |
| 2018/19 | 8 | 17,312 | |
| 2019/20 | 5 | 25,660 | |
| 2020/21 | 1 | 133 | COVID-19 period, left out of the statistics |
| 2021/22 | 51 | 8,630 | |
| 2022/23 | 48 | 52,393 | |
| 2023/24 | 52 | 29,832 | |
| 2024/25 | 6 | 65,657 | |
| 2025/26 | 52 | 44,758 | |
| 2026/27 | – | – | in progress |
Median peak: ISO week 20 (May) · middle 50%: weeks 13–23
Weak seasonality: peak weeks are widely spread (IQR about 10 weeks), possibly two peaks a year or year-round circulation, so a "usual peak week" says little.
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011 | 2 | 49 | |
| 2012 | 29 | 114 | |
| 2013 | 24 | 402 | |
| 2014 | 23 | 119 | |
| 2015 | 21 | 65 | |
| 2016 | 13 | 924 | |
| 2017 | 17 | 110 | |
| 2018 | 20 | 568 | |
| 2019 | 24 | 224 | |
| 2020 | 12 | 179 | COVID-19 period, left out of the statistics |
| 2022 | 1 | 1,239 | |
| 2023 | 13 | 1,485 | |
| 2024 | 9 | 1,301 | |
| 2025 | 22 | 2,667 | |
| 2026 | – | – | in progress |
Median peak: ISO week 34 (Aug) · middle 50%: week 33 – week 2 of the next year
Weak seasonality: peak weeks are widely spread (IQR about 22 weeks), possibly two peaks a year or year-round circulation, so a "usual peak week" says little.
| Season | Peak week (ISO) | Detections in peak week | |
|---|---|---|---|
| 2011/12 | 13 | 141 | |
| 2012/13 | 36 | 160 | |
| 2013/14 | 28 | 72 | |
| 2014/15 | 10 | 1,040 | |
| 2015/16 | 41 | 76 | |
| 2016/17 | 13 | 115 | |
| 2017/18 | 33 | 107 | |
| 2018/19 | 7 | 871 | |
| 2019/20 | 34 | 219 | |
| 2020/21 | 26 | 33 | COVID-19 period, left out of the statistics |
| 2021/22 | 33 | 484 | |
| 2022/23 | 32 | 217 | |
| 2023/24 | 34 | 130 | |
| 2024/25 | 29 | 114 | |
| 2025/26 | 33 | 218 | |
| 2026/27 | – | – | in progress |
Open the influenza fingerprint → The exhibit version of the same data: one ring per season, angle = week within the season, outward swing = that week's intensity.
These countries have weekly series pages: WHO FluNet stitched with ECDC ERVISS, with the source hand-over and overlap agreement shown.
Sorted by value, top 25
| Country/area | Value | Tested | Positivity | Latest week |
|---|---|---|---|---|
| China | 21,710 | 153,855 | 14.1% | 2026-10-19 |
| United States | 19,774 | 374,426 | 5.3% | 2026-10-19 |
| Canada | 7,062 | 166,938 | 4.2% | 2026-10-19 |
| China Hong Kong | 6,085 | 57,570 | 10.6% | 2026-10-12 |
| United Arab Emirates | 2,443 | 7,982 | 30.6% | 2026-10-12 |
| Chile | 2,407 | 28,697 | 8.4% | 2026-10-19 |
| Brazil | 1,938 | 66,195 | 2.9% | 2026-10-19 |
| Australia | 1,711 | 19,870 | 8.6% | 2026-10-19 |
| Malaysia | 1,525 | 5,546 | 27.5% | 2026-10-12 |
| Argentina | 1,496 | 14,480 | 10.3% | 2026-10-12 |
| Qatar | 1,459 | 5,084 | 28.7% | 2026-10-05 |
| Norway | 1,262 | 39,572 | 3.2% | 2026-10-19 |
| Indonesia | 1,253 | 2,533 | 49.5% | 2026-10-12 |
| Colombia | 962 | 15,053 | 6.4% | 2026-10-19 |
| Spain | 818 | 30,807 | 2.7% | 2026-10-19 |
| India | 799 | 5,887 | 13.6% | 2026-10-12 |
| Saudi Arabia | 762 | 5,830 | 13.1% | 2026-10-12 |
| France | 746 | 58,151 | 1.3% | 2026-10-19 |
| Bangladesh | 702 | 2,284 | 30.7% | 2026-10-12 |
| South Korea | 618 | 2,516 | 24.6% | 2026-10-12 |
| Malta | 554 | 5,249 | 10.6% | 2026-10-19 |
| Singapore | 554 | 1,400 | 39.6% | 2026-10-19 |
| Mexico | 553 | 6,441 | 8.6% | 2026-10-12 |
| Bhutan | 549 | 1,287 | 42.7% | 2026-10-19 |
| Peru | 527 | 6,222 | 8.5% | 2026-10-19 |
| Japan | 524 | 2,566 | 20.4% | 2026-10-12 |
| Denmark | 522 | 12,722 | 4.1% | 2026-10-19 |
| Senegal | 502 | 991 | 50.7% | 2026-10-19 |
| Iran | 472 | 14,106 | 3.3% | 2026-10-19 |
| Nepal | 406 | 1,364 | 29.8% | 2026-10-19 |
| Bahrain | 396 | 686 | 57.7% | 2026-10-19 |
| Sweden | 373 | 19,078 | 2% | 2026-10-19 |
| Switzerland | 348 | 196 | 177.6% | 2026-10-19 |
| Portugal | 281 | 16,289 | 1.7% | 2026-10-19 |
| Maldives | 279 | 633 | 44.1% | 2026-10-12 |
| Netherlands | 259 | 199 | 130.2% | 2026-10-19 |
| Thailand | 250 | 1,406 | 17.8% | 2026-10-12 |
| Belarus | 243 | 735 | 33.1% | 2026-10-12 |
| Belgium | 230 | 17 | – | 2026-10-19 |
| Luxembourg | 226 | 296 | 76.4% | 2026-10-19 |
| Oman | 226 | 560 | 40.4% | 2026-09-14 |
| Kuwait | 225 | 454 | 49.6% | 2026-10-12 |
| Brunei | 187 | 386 | 48.4% | 2026-10-19 |
| Ghana | 187 | 1,419 | 13.2% | 2026-10-05 |
| New Zealand | 183 | 536 | 34.1% | 2026-10-12 |
| Vietnam | 183 | 506 | 36.2% | 2026-10-12 |
| Cayman Islands | 179 | 766 | 23.4% | 2026-10-26 |
| Finland | 178 | – | – | 2026-10-12 |
| Cambodia | 174 | 653 | 26.6% | 2026-10-05 |
| Madagascar | 153 | 658 | 23.3% | 2026-10-19 |
| Ecuador | 142 | 808 | 17.6% | 2026-10-26 |
| Panama | 137 | 1,541 | 8.9% | 2026-10-19 |
| Costa Rica | 123 | 1,890 | 6.5% | 2026-09-14 |
| Russia | 119 | 48,329 | 0.2% | 2026-10-19 |
| Israel | 112 | 2,128 | 5.3% | 2026-10-12 |
| Fiji | 111 | 352 | 31.5% | 2026-09-28 |
| Sri Lanka | 106 | 385 | 27.5% | 2026-10-12 |
| Pakistan | 104 | 1,085 | 9.6% | 2026-10-12 |
| Philippines | 104 | 400 | 26% | 2026-10-05 |
| Kenya | 103 | 342 | 30.1% | 2026-10-19 |
| Venezuela | 96 | 469 | 20.5% | 2026-10-19 |
| El Salvador | 94 | 408 | 23% | 2026-10-19 |
| Guatemala | 91 | 937 | 9.7% | 2026-10-26 |
| Iceland | 89 | 1,323 | 6.7% | 2026-10-19 |
| Nicaragua | 85 | 1,601 | 5.3% | 2026-10-19 |
| Ireland | 82 | 1,948 | 4.2% | 2026-10-12 |
| Burkina Faso | 72 | 340 | 21.2% | 2026-10-12 |
| Myanmar (Burma) | 61 | 293 | 20.8% | 2026-10-19 |
| Dominican Republic | 59 | 447 | 13.2% | 2026-10-19 |
| Estonia | 54 | 11,864 | 0.5% | 2026-10-19 |
| Paraguay | 54 | 1,297 | 4.2% | 2026-10-12 |
| Cameroon | 48 | 569 | 8.4% | 2026-10-19 |
| Togo | 45 | 376 | 12% | 2026-10-19 |
| Honduras | 43 | 472 | 9.1% | 2026-10-19 |
| Slovakia | 43 | 115 | 37.4% | 2026-10-19 |
| Egypt | 41 | 1,535 | 2.7% | 2026-09-28 |
| Laos | 41 | 287 | 14.3% | 2026-09-28 |
| Niger | 40 | 317 | 12.6% | 2026-10-05 |
| Croatia | 38 | 805 | 4.7% | 2026-10-05 |
| Slovenia | 38 | 5,455 | 0.7% | 2026-10-19 |
| Mauritius | 35 | 204 | 17.2% | 2026-10-19 |
| Barbados | 33 | 222 | 14.9% | 2026-10-19 |
| South Africa | 33 | 592 | 5.6% | 2026-10-05 |
| Austria | 26 | 1,715 | 1.5% | 2026-10-19 |
| Czechia | 25 | 4,743 | 0.5% | 2026-10-19 |
| Bolivia | 24 | 195 | 12.3% | 2026-10-12 |
| Romania | 23 | 227 | 10.1% | 2026-10-19 |
| Liberia | 19 | 374 | 5.1% | 2026-10-19 |
| St. Vincent & Grenadines | 18 | 52 | 34.6% | 2026-09-14 |
| Afghanistan | 17 | 400 | 4.2% | 2026-10-12 |
| Zambia | 17 | 580 | 2.9% | 2026-10-05 |
| Tanzania | 16 | 988 | 1.6% | 2026-10-19 |
| Hungary | 14 | 864 | 1.6% | 2026-10-19 |
| Seychelles | 14 | 162 | 8.6% | 2026-10-12 |
| Uganda | 14 | 281 | 5% | 2026-10-19 |
| Greece | 12 | 215 | 5.6% | 2026-10-12 |
| Mongolia | 11 | 339 | 3.2% | 2026-10-12 |
| Germany | 10 | 404 | 2.5% | 2026-09-28 |
| Côte d’Ivoire | 9 | 490 | 1.8% | 2026-10-05 |
| Lebanon | 9 | 142 | 6.3% | 2026-10-19 |
| Bulgaria | 8 | 159 | 5% | 2026-10-19 |
| Cyprus | 8 | 86 | 9.3% | 2026-10-12 |
| Serbia | 8 | 64 | 12.5% | 2026-10-19 |
| Belize | 7 | 54 | 13% | 2026-10-12 |
| Ethiopia | 7 | 331 | 2.1% | 2026-09-28 |
| Lithuania | 7 | 406 | 1.7% | 2026-09-21 |
| Nigeria | 7 | 208 | 3.4% | 2026-10-05 |
| Guinea | 6 | 105 | 5.7% | 2026-09-28 |
| Iraq | 6 | 222 | 2.7% | 2026-10-19 |
| Mali | 5 | 47 | – | 2026-09-21 |
| Mauritania | 5 | 15 | – | 2026-10-12 |
| Poland | 5 | 782 | 0.6% | 2026-10-19 |
| Uruguay | 5 | 369 | 1.4% | 2026-10-12 |
| Yemen | 5 | 57 | 8.8% | 2026-10-12 |
| Sudan | 4 | 115 | 3.5% | 2026-10-12 |
| Tajikistan | 4 | 254 | 1.6% | 2026-10-12 |
| Cuba | 3 | 127 | 2.4% | 2026-10-05 |
| Georgia | 3 | 369 | 0.8% | 2026-10-19 |
| Guyana | 3 | 200 | 1.5% | 2026-10-12 |
| Jamaica | 2 | 211 | 0.9% | 2026-09-14 |
| Moldova | 2 | 188 | 1.1% | 2026-10-12 |
| Suriname | 2 | 30 | – | 2026-09-28 |
| Kosovo | 2 | 322 | 0.6% | 2026-10-19 |
| Kazakhstan | 1 | 1,417 | 0.1% | 2026-10-05 |
| Liechtenstein | 1 | – | – | 2026-09-14 |
| Syria | 1 | 174 | 0.6% | 2026-09-28 |
| Tunisia | 1 | 160 | 0.6% | 2026-09-28 |
Recent items from MMWR, Eurosurveillance, EID, China CDC Weekly and PLOS NTDs (titles and original links only; bodies are not republished).
China CDC Weekly national notifiable infectious disease monthly report titles and links; case counts are not ingested here.
ISO week · all sample origins summed · via the WHO xMart interface
Licence: WHO terms (FluNet: licence not specified)
retrieved Nov 2, 2026 · SHA-256 0a1c58f3d4…
sentinelTestsDetectionsPositivity
ISO week · primary-care sentinel · attribution: Data provided by ECDC
Licence: CC BY 4.0 (ECDC copyright page)
retrieved Nov 2, 2026 · SHA-256 a47fe57dd0…
Detections reflect both activity and testing volume, and testing strategies differ by country: do not use them to rank countries or infer risk.
Data are provisional and may be revised retrospectively; empty values mean not reported and are never filled with zero.