2025-03-11-世界卫生组织-Influenza_Update_N°_518_1页_1mb

Global Respiratory Virus Activity Summary (Week 518, Ending 09 Mar 2025)

Influenza

• Northern Hemisphere: Activity decreased or remained stable in most countries, but increased in Central America/Caribbean, Tropical South America, Northern/Western/Middle Africa, Central/South/Southeast Asia, and Eastern Europe. Elevated activity persists in North America, Central America/Caribbean, Tropical South America (predominantly A(H3N2)), Northern Africa (A(H3N2)), Western Africa (A(H1N1)pdm09), Europe (A and B co-dominant), Central Asia (B predominant), Western/Southern Asia (A(H3N2)), and SE/East Asia (A(H1N1)pdm09).
• Southern Hemisphere: Activity elevated in parts of Eastern Africa (A(H3N2)) and Oceania (A(H1N1)pdm09). Overall, activity generally remained stable or decreased except in specified regions.

SARS-CoV-2

• Globally, activity remains low, with elevated activity reported in select countries in Central America/Caribbean and Temperate South America. Increases noted in single countries in Eastern Europe and Tropical South America.

Key Trends

• Both influenza and SARS-CoV-2 proportions decreased or remained stable in most regions, except for localized increases in certain parts of the Americas and Asia.

Note: Data primarily draws from the provided text excerpt.