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: Weekly Viral Respiratory Illness Snapshot

CDC: COVID-19 Wastewater Surveillance

Recent Updates

Respiratory Illness Snapshot

  • Nationally, as of March 15th seasonal influenza influenza activity remains elevated and is increasing in some areas of the country. RSV activity is decreasing in all areas of the country.
  • In Wisconsin, as of March 9th, influenza-like-illness activity is moderate or high in all regions. While influenza activity is increasing in school-aged children, RSV and COVID-19 are decreasing.

Other News

  • March 4th, it was reported that the COVID-19 variant, BA.2.87.1, was detected in Southeast Asia.
  • March 5th, influenza virus strains for a trivalent vaccin composition for use in the U.S. were recommended by the FDA's Vaccines and Related Biological Products Advisory Committee (VRBPAC). 
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