If you are in Delhi-NCR and have recently been coughing, sneezing, or running a fever, you are not alone. A recent LocalCircles survey shows that 69 per cent of households in the region currently have one or more members experiencing Covid, flu, or viral fever-like symptoms.The report, titled “Viral illnesses soar in Delhi NCR as 69% households surveyed confirm one or more members experiencing symptoms,” highlights a sharp increase from 54 per cent in March 2025 to 69 per cent now. Here’s a closer look at the H3N2 virus, its symptoms, and the precautions you should take.What Is the H3N2 Virus?H3N2 is a subtype of the influenza A virus. According to the World Health Organization (WHO), it causes seasonal flu outbreaks and mutates frequently, which makes it more challenging to manage than other flu strains.The virus spreads rapidly through droplets from coughing, sneezing, or even talking. It can also spread when a person touches contaminated surfaces and then touches their face. H3N2 can be particularly dangerous for young children, the elderly, pregnant women, and people with weakened immune systems. The Centers for Disease Control and Prevention (CDC) warns that in these groups, H3N2 can lead to serious complications such as pneumonia, bronchitis, and hospitalization.ALSO READ: Global Warming Is Driving a Surge in Dengue Cases, Study WarnsSymptoms of H3N2 Virus to Watch ForAccording to the Indian Council of Medical Research (ICMR), H3N2 has been the predominant strain causing the recent surge in flu cases across India. Data from hospital admissions for Severe Acute Respiratory Infection (SARI) indicates that 50% of these patients tested positive for H3N2.Common symptoms include:Sudden high fever (often above 38–39°C) with chillsPersistent cough and sore throatSevere fatigue, weakness, and body achesHeadache and nasal congestionIn children: nausea, vomiting, or diarrheaMany patients report fever lasting more than 5–7 days, with cough persisting even after other symptoms subside.ALSO READ: West Nile Virus Isn't Over Yet, New Cases In US On RisePrecautions Against H3N2 VirusPrevention is key, and National Institute of Health recommend the following measures:Wash hands regularly with soap and water for at least 20 secondsWear masks in crowded or poorly ventilated areasCover your mouth and nose when coughing or sneezing; dispose of tissues immediatelyAvoid close contact with sick individuals; isolate infected household members if possibleKeep living spaces well-ventilatedMaintain good nutrition, hydration, and adequate restConsider the seasonal influenza vaccine, which often protects against H3N2 strains—especially important for children, the elderly, and those with chronic illnessesH3N2 in the United StatesThe 2017–18 flu season in the U.S. was particularly severe, with the CDC estimating that 41 million people experienced flu symptoms, including 52,000 deaths. However, as of now, no significant H3N2 cases are being reported in the U.S.The WHO continues to stress that vaccination is the most effective way to prevent influenza, particularly for high-risk groups and their caregivers.
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