The H1N1 influenza strain has emerged as the predominant strain detected in India, accounting for 75% of influenza-positive samples recorded in the latest WHO surveillance data.
According to WHO data for epidemiological weeks 36 and 37, covering September 1-14, 2026, 817 of 3,632 samples tested across the WHO South-East Asia Region were positive for influenza, representing a positivity rate of 22%.
India recorded one of the highest proportions of H1N1 among its influenza-positive samples, with A(H1N1)pdm09 accounting for three-quarters of the detected cases. The strain represented 50% of influenza-positive samples across the wider region.
H1N1 was also the leading strain reported in Bhutan and Thailand, accounting for 97% and 74% of their respective influenza-positive samples.
Higher-risk groups advised to take precautions
Dr Rommel Tickoo, Senior Director, Internal Medicine, Max Hospital, said seasonal influenza can lead to complications, particularly among older adults, pregnant women, young children and people with underlying health conditions.
Preventive measures include influenza vaccination, regular hand and respiratory hygiene, appropriate testing and timely antiviral treatment for patients at higher risk of complications.
