H3N2 influenza virus alert: Cough, fever, and body ache cases surge in Delhi, Noida, Gurgaon and across NCR; How to protect yourself

Delhi and its neighbouring cities are witnessing a noticeable rise in cases of H3N2 influenza, a subtype of Influenza A virus. Over the past few months, local doctors have reported an increase in patients presenting with high fever, persistent cough, body aches, fatigue, and sore throats. Health experts are warning that symptoms this year appear to be more severe than in previous influenza seasons.

What is H3N2?

H3N2 is a strain of Influenza A virus, which is one of the common causes of seasonal flu worldwide. Unlike the regular cold, H3N2 flu can cause sudden high fever, muscle pain, headache, and extreme tiredness, sometimes leading to complications like pneumonia in vulnerable populations. This strain is known to mutate frequently, which is why flu vaccines need to be updated each year.

Although anyone can catch H3N2, it is particularly dangerous for children, older adults, pregnant women, and people with weakened immune systems. In India, the peak of flu season usually coincides with the cooler months, but doctors say this year’s spike has come earlier than expected.

H3N2 Influenza: Symptoms to Watch Out For

The most common symptoms of H3N2 influenza include:

• High fever and chills
• Persistent cough and sore throat
• Body aches and muscle pain
• Fatigue and weakness
• Headache
• Occasionally, nausea or vomiting

Doctors emphasise that this year, patients are reporting more intense fatigue and higher fever compared to previous flu seasons. Anyone experiencing these symptoms, especially if they persist for more than a couple of days, should seek medical advice promptly.

How H3N2 Spreads

H3N2 spreads easily from person to person through respiratory droplets when an infected person coughs or sneezes. Touching surfaces contaminated with the virus and then touching your face, nose, or mouth can also lead to infection. Crowded places like schools, offices, and public transport increase the risk of transmission.

How to Stay Safe from H3N2 Infection

Preventing H3N2 infection involves simple yet effective steps:

• Get Vaccinated – Annual flu vaccines include protection against H3N2 and are especially recommended for children, the elderly, and those with chronic illnesses.
• Maintain Hygiene – Wash your hands frequently with soap and water, and use alcohol-based hand sanitiser when outside.
• Wear Masks – In crowded areas, wearing a mask can help reduce the risk of inhaling viral droplets.
• Avoid Close Contact – Stay away from people who are showing flu-like symptoms.
• Boost Immunity – Eat a balanced diet rich in fruits and vegetables, stay hydrated, and get adequate sleep.
• Stay Home if Sick – If you develop symptoms, isolate yourself to prevent spreading the virus to others.

When to See a Doctor

• Seek medical attention immediately if you experience:
• Persistent high fever not relieved by medication
• Shortness of breath or difficulty breathing
• Severe chest pain
• Symptoms worsening rapidly, especially in children or older adults

Early detection and timely treatment can prevent complications, which may include pneumonia or worsening of pre-existing conditions.

While the rise in H3N2 flu cases in Delhi is concerning, following preventive measures, getting vaccinated, and seeking prompt medical care can significantly reduce the risk of infection and severe illness. Health experts urge residents to remain vigilant, especially in public spaces, and not to ignore flu-like symptoms this season.

Inputs from agencies