2023-10-15-世界卫生组织-Influenza_Update_N°_456_13页_1mb

Globally, influenza activity remained low with varying trends by region and season. Recommendations include monitoring co-circulation with SARS-CoV-2 and prioritizing influenza in differential diagnoses for high-risk groups. Key findings:

• Oceania saw decreasing influenza A activity, with RSV low.
• South Africa and most South and Central America had low detections, below seasonal thresholds.
• Tropical Africa showed all subtypes co-circulating but low activity; Southern Asia increased activity with A(H3N2) predominant.
• Southeast Asia maintained elevated activity, co-circulating A(H1N1)pdm09 and A(H3N2).
• Northern Hemisphere temperate zones had mostly low activity, except Eastern and Western Asia where A(H3N2) was prevalent.
  SARS-CoV-2 positivity averaged around 10% globally from sentinel surveillance, decreasing in some regions. RSV activity was generally low across most areas. Laboratory data from GISRS showed influenza A and B viruses detected, with A(H1N1)pdm09 and A(H3N2) dominating in multiple regions.