H1N1 dominates flu strains in India, accounts for 3 out of 4 cases: WHO

The finding is from WHO's surveillance data for weeks 36 and 37 of 2026, covering Sept 1 to 14 and updated on Sept 21. Across the South-East Asia region, 817 of 3,632 samples tested positive for influenza, giving an overall positivity rate of 22%.

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