No new strain of H1N1, say ICMR sources as swine flu cases rise
The Indian Council of Medical Research (ICMR) has confirmed that the recent rise in swine flu cases in Delhi is not caused by a new strain of H1N1. Officials state that current vaccines are effective and advise the public to maintain hygiene and seek medical care if symptoms worsen.
Why it matters
Public health updates are critical for managing community anxiety and ensuring appropriate medical responses during seasonal outbreaks.
No new strain of H1N1 has been identified, and there is no cause for panic, sources at the Indian Council of Medical Research (ICMR) said on Sunday (August 23, 2026) amid an increase in swine flu cases in Delhi and other parts of the country.
The Influenza strains currently circulating are "well matched with the vaccine strains recommended for the Northern Hemisphere", they said.
Seasonal influenza, including H1N1, is mostly self-limiting. Common symptoms include fever, cough, headache and body ache, and most people recover with appropriate care and rest.
However, young children, elderly persons and individuals with underlying medical conditions may be at greater risk of complications, the sources said.
The Influenza A (H1N1) pdm09 viruses currently circulating in the country belong to the A/Missouri/11/2025 (H1N1) pdm09-like virus strain, sources at ICMR said.
These viruses belong to clade 6B.1A.5a2a, subclade D.3.1.1, and have been in circulation since 2025.
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