Archive · 23 Aug 2026
Delhi H1N1 Cases Rise; ICMR Says No New Strain
Delhi has reported many cases of a flu called H1N1 this year.
Officials counted 1,777 H1N1 cases through August 20.
There were 2,602 seasonal influenza cases when other flu types were included.
Scientists said the virus is not a new strain.
They said it has been circulating in India since 2025.
Most people recover with rest and appropriate care.
Young children, older people, pregnant women and people with health problems may become more seriously ill.
People should contact a doctor if symptoms get worse, last too long or cause breathing problems.
Washing hands, using masks in crowded places and avoiding close contact with sick people can help limit spread.
Delhi recorded 1,777 H1N1 cases through August 20, 2026, including 114 reported that day.
Seasonal influenza cases totaled 2,602, comprising 2,392 Influenza A and 210 Influenza B cases.
ICMR identified the circulating virus as an A/Missouri/11/2025-like H1N1 strain already circulating in India since 2025.
ICMR said the circulating influenza strains match Northern Hemisphere vaccine recommendations and urged people not to panic.
Delhi and national officials expanded surveillance, hospital preparedness and public-health advice, while high-risk groups were urged to seek timely care.
- Who
- Delhi residents, the Delhi government, the Indian Council of Medical Research, Union Health Minister J. P. Nadda and Delhi Health Minister Pankaj Kumar Singh.
- What
- Delhi reported a rise in H1N1 cases, while ICMR said no new strain had been detected and described the circulating virus as an existing strain.
- When
- The Delhi government figures cover cases through August 20, 2026; ICMR’s reassurance and officials’ preparedness reviews were reported around the same period.
- Where
- Delhi and other parts of India.
- Why
- The increase in H1N1 cases raised concerns about a new or more dangerous strain, prompting reassurance, surveillance and preparedness measures.
Concern and Caution
ICMR Reassurance
Meaning of rising case numbers
Concern and Caution
The increase, including 114 H1N1 cases reported in one day, raised concern that a new or more dangerous virus variant might be circulating.
ICMR Reassurance
ICMR said no new H1N1 strain has been identified and that the circulating virus has been present in India since 2025.
Level of public concern
Concern and Caution
Experts and officials said continued vigilance is needed because young children, older adults, pregnant women and people with health conditions can develop complications.
ICMR Reassurance
ICMR scientists said seasonal influenza is mostly self-limiting, and most people recover with appropriate care and rest.
Response to the increase
Concern and Caution
The case numbers support stronger surveillance, public awareness and readiness involving beds, oxygen-supported care, ventilators, medicines and diagnostics.
ICMR Reassurance
Government officials said surveillance, hospital reviews, advisories and preparedness measures are already in place, with Delhi reporting no shortage of doctors, medicines or beds.
- H1N1 cases
- Delhi reported 1,777 H1N1 cases through August 20, 2026.
- Cases reported in one day
- Delhi recorded 114 H1N1 cases on August 20, according to one government-data report.
- Seasonal influenza total
- Delhi reported 2,602 Influenza A and B cases cumulatively.
- Influenza breakdown
- The reported total included 2,392 Influenza A cases and 210 Influenza B cases; H1N1 accounted for 1,777 cases.
- Circulating strain
- ICMR identified A/Missouri/11/2025 (H1N1) pdm09-like virus, from clade 6B.1A.5a2a and subclade D.3.1.1.
- Vaccine matching
- ICMR said the circulating influenza strains are well matched with Northern Hemisphere-recommended vaccine strains.
- Higher-risk groups
- Young children, older adults, pregnant women and people with underlying or chronic conditions may face greater risks of complications.
- Public-health response
- Delhi is monitoring influenza-like illness and severe acute respiratory infections through surveillance systems, while hospitals receive preparedness and reporting guidance.
