The illness is linked to Influenza-A (H3N2) and a genetically changed subclade that has also caused a surge in flu cases in several European countries, including the UK. According to the World Health Organization, flu activity is increasing globally, with cases appearing earlier than usual this season.

Experts say the virus does not appear to cause more severe illness than previous strains, but its rapid spread is concerning. Pakistan’s younger population may reduce overall severity, but elderly people, children, and those with chronic illnesses remain at higher risk.

Dr Javed Akram, former provincial health minister, said genetic changes in the virus increase the danger for medically vulnerable individuals. He advised people to get vaccinated before winter peaks, noting that flu vaccines reduce infection risk by around 70 percent.

Also Read: H3N2 flu strain sparks early winter as doctors warn of a harsher season

Dr Rana Safdar, former national COVID-19 response lead, confirmed that the same H3N2 subclade reported abroad is circulating in Pakistan. He warned that winter smog could further accelerate transmission, particularly in urban areas.

Hospitals in Lahore, Gujranwala, Rawalpindi, and Faisalabad have reported a sharp rise in flu patients, with children often spreading the virus to older family members. While no deaths linked to this strain have been reported so far, doctors say chest complications are increasing.

Medical experts have advised against unnecessary antibiotic use, stressing that rest, hydration, warm fluids, and proper nutrition remain key treatments. Antiviral medicines such as Oseltamivir should only be used for high-risk patients on medical advice.

The National Institute of Health confirmed that seasonal influenza cases are rising in line with global trends. Doctors have recommended vaccination for everyone above six months of age, along with mask use, hand hygiene, ventilation, and avoiding crowded places.