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

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

CDC: Respiratory Illness Data Channel

DHS: Respiratory Illness Data Snapshot

CDC: COVID-19 Wastewater Surveillance

DHS: COVID-19 Wastewater Data

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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