Key trends
Weekly summary – September 24, 2026
Current respiratory activity is measured in consideration of recent past respiratory seasons.
- RSV test positivity remains low. Wastewater levels are stable and low.
- SARS-CoV-2 test positivity has remained stable in the reporting period and is low-to-moderate, although clinical detections have increased. Wastewater levels continue to increase in some sites and are at moderate levels. Hospital admissions have slightly increased but remain low.
- The proportions of emergency department and primary care visits for respiratory illness are low but have increased over the past several weeks.
- In Canada, as of September 4, 2026, indicators of influenza activity were stable at inter-seasonal levels in the most recent reporting week.
- In the USA, seasonal influenza activity is low.
- In the European Union/European Economic Area (EU/EEA), influenza activity is low overall, with only a few countries reporting detection.
- In Canada, as of September 4, 2026, indicators of RSV activity were stable at inter-seasonal levels in the most recent reporting week.
- In the USA, RSV activity is very low in most areas of the country.
- In the EU/EEA, RSV activity is low and at expected inter-seasonal levels.
- In Canada, as of September 4, 2026, indicators of COVID-19 activity were low but showing signs of increase.
- In the USA, COVID-19 activity is elevated and increasing nationally, but hospitalizations remain low overall.
- In the EU/EEA, SARS-CoV-2 activity is increasing slightly in primary and secondary care in several countries.
