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 May 24th, seasonal influenza, COVID-19, and RSV activity is low. 
  • In Wisconsin, as of May 18th, COVID-19, RSV, and influenza continue to circulate at low levels. Rhino/enterovirus, human metapneumovirus, and parainfluenza virus activities are elevated.

Other News

  • May 10th, Sanofi and Novavax announced a co-exclusive licensing agreement to co-commericialize COVID-19 vaccine beginning in 2025 and develop novel flu-COVID-19 combination vaccines.
  • May 13th, the FDA advised against using Cue Health's COVID-19 tests for at-home, over-the-counter, and point-of-contact care settings due to an increased risk of false results.
  • May 17th, the CDC released guidance for preventing the spread of infections in K-12 schools to help maximize school attendance.
  • May 18th, Singapore's health ministry announced a recent rise in COVID-19 infections. They noted cases were up for the week ending May 11 and an increase in hospitalizations. 
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