Maharashtra is witnessing a significant surge in influenza A (H1N1) cases, with the 2026 tally already surpassing the total recorded for the entire previous year. By Aug 21, this year, the state had reported 1,109 H1N1 cases, a sharp increase compared to the 942 cases recorded throughout all of 2025.
Mumbai and Pune remain the primary epicenters of the outbreak, together accounting for 65% of the state’s total infections. Nationwide, several regions, including Delhi, are reporting similar upward trends. Despite the rise, the Indian Council of Medical Research (ICMR) has clarified that the circulating influenza A (H1N1) pdm09 viruses have been present since 2025 and no new strain has been identified. ICMR officials have urged citizens not to panic.
Medical practitioners are seeing the impact of this surge firsthand. Dr. Danish H. Memon, Head of the Department of Medicine at Noble Hospitals and Research Centre, reported that nearly 50% of outpatient department (OPD) visits are currently influenza-related, mostly Swine Flu.
“Most patients present with high-grade fever, severe body aches, and respiratory symptoms such as a dry cough, runny nose, and sore throat,” Dr Memon said. He highlighted that treatment remains highly effective. “Patients are showing dramatic responses to antivirals like oral Oseltamivir. While almost all recover via OPD care, older individuals with chronic conditions like diabetes or cardiac ailments remain at risk of progressing to pneumonia and requiring hospitalisation.
“In severe cases, influenza can lead to complications such as pneumonia and sepsis,” Dr Shiwarkar warned. “Since the virus spreads easily through respiratory droplets and contaminated surfaces, those who are unwell should isolate, practice cough etiquette, and wash their hands regularly. We strongly suggest that annual influenza vaccination remains the most effective way to reduce the risk of infection and severe complications.”
While the majority of cases are not severe, ICMR stated that it continues to closely monitor the situation through regular nationwide surveillance to track any potential changes in viral behaviour.