Western WI Public Health Readiness Consortia

Respiratory Viruses

Respiratory viruses cause illnesses that affect the nose, throat, and breathing passages. These viruses often result in common cold and influenza-like symptoms. Common respiratory viruses include:

Influenza
Parainfluenza
Adenovirus
Respiratory Syncytial Virus (RSV)

Rhinovirus/Enterovirus
Coronavirus
Human Metapneumovirus
COVID-19

The following surveillance tools can help public health monitor the occurrence and trends of common respiratory viruses during the respiratory illness season.

DHS: Weekly Respiratory Virus Surveillance Report

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CDC: National Respiratory & Enteric Virus Surveillance System (NREVSS)

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CDC: Respiratory Illness Data Channel

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DHS: Respiratory Illness Data Snapshot

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CDC: COVID-19 Wastewater Surveillance

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DHS: COVID-19 Wastewater Data

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Recent Updates

Respiratory Illness Snapshot

Nationally, as of March 28th, COVID-19 and RSV activity are declining nationally to low levels. Seasonal influenza activity continues to decline.
In Wisconsin, as of March 22nd, influenza activity is low based on emergency department, laboratory testing, and wastewater data. COVID-19 activity is low. RSV activity is moderate and decreasing. Seasonal coronavirus activity is increasing.

Other News

March 13th, the FDA announced flu strain picks for next season's (2025-2026) vaccines.
As of March 24th, Wisconsin has 224 confirmed cases of pertussis and 5 hospitalizations in 2025.

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