H1N1 Cases Surge in Delhi, Influenza-A Tally Crosses 2,300; Govt Issues Advisory

India is witnessing a rise in seasonal flu infections, with Delhi reporting 2,308 H1N1 cases as health authorities intensify surveillance of respiratory viruses across the country.

The increase has prompted the Delhi government to issue a public advisory, urging residents to take precautions, especially in crowded areas. Officials, however, have said there is no reason to panic and that adequate medical facilities are available.

ICMR Director General Rajiv Bahl said around 650 cases of another influenza variant have also been detected. He said current surveillance data indicates that Influenza A, Influenza B and Covid are all circulating, with H1N1 currently accounting for a significant share of respiratory infections.

Delhi On Alert As H1N1 Cases Increase

Delhi Health Minister Pankaj Singh said the government is closely monitoring H1N1 and dengue cases and has made arrangements to deal with any increase in patients.

The minister said around 3,000 patients with H1N1 and other flu variants have sought treatment, with most recovering and being discharged. Of these, 2,308 cases were identified as H1N1, while approximately 600-650 involved another variant.

Singh said Delhi has recorded around 2,200 dengue cases so far. He added that no deaths linked to the current infections have been reported and that no patient is currently on a ventilator or in an ICU due to the illness.

Hospitals have been instructed to maintain adequate beds, medicines and medical staff. Isolation wards for H1N1 patients have also been established, and the health minister said action would be taken if patients are denied beds.

Residents have been advised to wear masks in crowded places and follow basic respiratory hygiene measures.

H1N1 Circulation Being Tracked Nationwide

Bahl said India’s ability to identify circulating viruses has improved significantly since the Covid pandemic. The country’s surveillance network now enables health authorities to monitor respiratory infections and identify changes in the viruses being detected.

The surveillance system includes 73 laboratories across India. Around 25 samples are tested every week from patients with severe acute respiratory infections and other cases, covering a broad range of viruses.

The latest surveillance data shows considerable circulation of H1N1 across India.

Influenza B, Covid Also Detected

While H1N1 is currently the dominant virus being detected, Bahl said Influenza B is also circulating. Some Covid infections have also been reported. Health authorities are monitoring the situation week by week to identify changes in the prevalence of the three respiratory viruses.

Bahl said the surveillance network also tracks other illnesses, including diarrhoea and undifferentiated fever, allowing officials to determine which infections are circulating at different times.

Experts Say Current Flu Is Seasonal

Bahl said the rise in H1N1 cases does not indicate the emergence of a new virus. Influenza viruses undergo mutations regularly, meaning that infection in one season does not necessarily prevent infection in a subsequent season. Most infections are mild, he said, although severe illness can occur among vulnerable groups, including very young children, people over 65, immunocompromised individuals and pregnant women.

Precautions For People With Flu Symptoms

People who develop flu-like symptoms should get adequate rest, eat properly and drink sufficient fluids. Bahl said many patients recover within a few days with supportive care. Since influenza spreads through respiratory droplets, people with symptoms should avoid close contact with others and maintain good respiratory hygiene. Frequently touched surfaces should also be cleaned regularly.

Antibiotics are not effective against influenza because it is a viral infection. Antiviral medicines may be used for patients at higher risk of severe illness, based on medical advice.

Warning Signs That Require Medical Attention

People experiencing breathing difficulties or chest pain should seek medical attention immediately. Although serious complications are uncommon, certain groups remain more vulnerable to severe disease. Flu vaccines are available in India, with several vaccines licensed for use. Bahl said vaccination is particularly recommended for people at higher risk, in line with WHO guidance, although it is not mandatory.

Authorities have urged people to remain alert, follow basic precautions and avoid panic while surveillance of H1N1, Influenza B and Covid continues.