Influenza — Worldwide/Unknown
Information in this report is categorized by influenza transmission zones, which are geographical groups of countries, areas or territories with similar influenza transmission patterns.
Summary
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– In the temperate zone of the northern hemisphere, respiratory illness indicators and influenza activity remained elevated overall.
– In North America, influenza activity remained elevated, with influenza A(H1N1)pdm09 and B viruses co-circulating.
– In Europe, influenza activity
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