Wisconsin Respiratory Illness Activity Has Risen
State health data shows rising emergency visits as flu season approaches.
Updated on Oct. 6, 2026 in Asthma
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Wisconsin emergency department visits linked to respiratory illnesses climbed to 12% by late September, up from 7% in July. The state is now monitoring seasonal trends as colder weather approaches.
Why it matters
Rising respiratory activity suggests the beginning of the seasonal illness cycle in Wisconsin, necessitating increased awareness of symptoms as influenza cases are expected to climb further.
Official state surveillance reports that 12% of emergency department visits were linked to respiratory illness by September 26, compared to 7% in July. The impact of circulating pathogens like rhinovirus, which showed a 33.5% positive test rate, remains an ongoing point of investigation.
The players
Wisconsin Department of Health Services
The state agency responsible for monitoring health trends and reporting respiratory illness data in Wisconsin.
Centers for Disease Control and Prevention
The national public health institute that develops the R-naught metrics used to measure community disease transmission.
The details
The Department of Health Services monitors health trends by tracking emergency department visits and laboratory test positivity rates. These metrics help officials identify the spread of viruses such as SARS-CoV-2 and influenza. Additionally, the Centers for Disease Control and Prevention utilizes the R-naught value, which is currently 0.88, to measure the rate at which an infectious disease is transmitted throughout the community.
Timeline
July 2026: Respiratory illness emergency department visits stood at 7%.
September 13, 2026: 5% of deaths were associated with pneumonia, COVID-19, influenza, or RSV.
September 26, 2026: Emergency department visits for respiratory illness reached 12%.
Health Landscape
This uptick aligns with historical seasonal patterns observed during the annual flu diagnosis peak. Current monitoring efforts reflect a broader public health priority to manage the surge of viral transmission typical during late autumn and winter months.
Residents should monitor personal symptoms and stay informed on local health updates as seasonal respiratory illnesses rise. It is worth discussing with your doctor whether preventive measures or checkups are necessary based on your personal health risks.
The takeaway
While overall transmission remains low, respiratory activity is trending upward as winter approaches. Residents are encouraged to track local guidance and consult their physician regarding appropriate preventive measures during the transition into colder months.
What happens next
Public health projections indicate that influenza-like illness cases are expected to increase across the state throughout November and December.
Further reading
Learn more about managing respiratory health conditions at Wisconsin Asthma.
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