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

NEW DELHI: H1N1 is the dominant flu strain detected in India, accounting for three out of every four influenza-positive samples reported in the latest surveillance data, according to World Health Organization (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%.India stood out for a high share of H1N1 among its positive samples.