HealthTrack Trend Update

Initial circulation patterns suggest an early start to respiratory virus season, with Influenza activity rising more than a month ahead of typical seasonal patterns. This suggests Influenza will circulate concurrently with Respiratory Syncytial Virus (RSV) this year, which is also on the rise. RSV positivity is tracking according to normal seasonal trends.

Infection Trends

• Influenza A & B: Showing an early rise, reaching 2.7% positivity in HealthTrack data last week.
• COVID-19 (SARS-CoV-2): COVID had a modest peak in mid-August, reaching 5.9%, but has since been on the decline dropping to 2.7% this past week.
• Respiratory Syncytial Virus (RSV): Positivity rates are starting to rise, slowly ticking up to 1.3% last week. On track normal RSV circulation patterns.
• Rhinovirus/Enterovirus: Remains the most frequently detected respiratory virus, at 35.2%.
• Enterovirus D68: EVD68 is showing a significant increase in positivity compared to normal fall patterns, reaching 4.3%.
• Other notable viruses circulating include Adenovirus (4.2%), Seasonal Coronaviruses (2.5%), and Parainfluenza virus (5.0%).