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CDC · emergency department data · weekly · week ending 24 October 2026

Flu in Wisconsin This Week

In the week ending 24 October 2026, flu accounted for 0.34% of emergency department visits in Wisconsin, up from 0.24% the week before (0.09% in the same week of 2025). CDC rates overall respiratory illness activity in Wisconsin as Very Low.

All states CDC FluView ↗ Flu A in wastewater UK flu

0.34%
ER visits for flu, week ending 24 Oct
0.24%
The week before
Very Low
CDC respiratory illness level

Recent weeks in Wisconsin — share of emergency department visits

Week endingFluCOVID-19RSVCDC flu trend
24 Oct 20260.34% 0.14%0.01%Increasing
17 Oct 20260.24% 0.14%0.02%No Change
10 Oct 20260.23% 0.16%0.01%No Change
3 Oct 20260.21% 0.24%0.01%No Change
26 Sep 20260.26% 0.18%0.00%Increasing
19 Sep 20260.22% 0.15%0.01%Increasing
12 Sep 20260.18% 0.16%0.00%Increasing
5 Sep 20260.21% 0.13%0.00%Increasing
29 Aug 20260.07% 0.12%0.00%Increasing
22 Aug 20260.04% 0.08%0.00%No Change
15 Aug 20260.04% 0.06%0.00%No Change
8 Aug 20260.02% 0.06%0.00%No Change
1 Aug 20260.03% 0.07%0.00%No Change
25 Jul 20260.03% 0.05%0.01%No Change

Same week of 2025: flu 0.09% of visits. The newest weeks can still be revised as late records arrive.

Official advice

What this page shows, and what it misses

Two CDC weekly numbers for each state. The flu share of ER visits is the percentage of all emergency department visits that were diagnosed as flu, from hospitals reporting to the National Syndromic Surveillance Program, with CDC's own trend label. The respiratory illness level is CDC's official grade for all acute respiratory illness — flu, COVID-19, RSV and colds together — so a state can be graded High while flu is still low. Neither number counts flu cases: most people with flu never go to an ER, and not every hospital reports. Territories and states without data show "—". Flu virus in sewage is on our wastewater page.

Data: Centers for Disease Control and Prevention — "Level of Acute Respiratory Illness (ARI) Activity by State" and National Syndromic Surveillance Program "Emergency Department Visit Trajectories by State" (data.cdc.gov) — public domain U.S. Government works.

FAQ Flu questions

Is flu going around in Wisconsin right now?
In the week ending 24 October 2026, flu accounted for 0.34% of emergency department visits in Wisconsin, up from 0.24% the week before (0.09% in the same week of 2025). CDC rates overall respiratory illness activity in Wisconsin as Very Low.
What does CDC's respiratory illness level mean?
CDC grades each state every week from Very Low to Very High by how many emergency department visits are for acute respiratory illness of any kind — flu, COVID-19, RSV and colds — compared with that state's own usual range. It is not a flu-only measure; the flu share of visits on this page is.
Where can I get a flu shot in Wisconsin?
CDC's vaccines.gov lists pharmacies and clinics near you that have flu vaccine. CDC recommends a yearly flu vaccine for everyone aged 6 months and older, with rare exceptions.