Surge in H3N2 Influenza and Respiratory Illnesses in Hyd

Hema Singuluri| Hyderabad 

Hyderabad is witnessing a significant rise in seasonal influenza cases, particularly driven by the H3N2 strain of the influenza A virus, as well as other respiratory infections amid ongoing weather shifts.   

Medical professionals say that the sudden weather transition from winter to warmer conditions creates an environment in which respiratory viruses spread more easily. Fluctuating temperatures and dry air can weaken the body’s immune defences, allowing viruses like H3N2 to take advantage and trigger infections. Government hospitals such as Fever Hospital at Nallakunta and Osmania General Hospital have reported a marked increase in patients presenting with fever, dry cough, body aches, fatigue, sore throat and other flu‑like symptoms, overwhelming outpatient departments and prompting doctors to urge enhanced public vigilance.  

Doctors stress on Precautions

Dr Keshavan, a consultant pulmonologist at Apollo Hospitals, says that H3N2 is a specific subtype of the influenza A virus, distinct from the common cold or basic seasonal flu viruses, and it tends to present with more intense symptoms that can linger longer than typical viral colds.  

Symptoms include high fever, persistent dry cough, severe body and muscle aches, headache, sore throat, fatigue, chills and occasional chills and sweating, and recovery can take up to 5 to 10 days in many patients, with fatigue sometimes lingering longer.  

He noted that while most otherwise healthy adults are able to manage symptoms at home with rest, hydration and over‑the‑counter supportive care, higher‑risk groups such as children under five, older adults, pregnant women and those with compromised immunity continue to require hospital care more often. These vulnerable populations are more likely to experience complications that can lead to bronchitis or pneumonia and may need monitoring or admission if symptoms worsen.  

“The current air quality is affecting immunity”, he added explaining how the pollution and the serious concerns of the dust particles. Poor air quality and rising pollution levels in Hyderabad are contributing to respiratory irritation and weakening lung defences, making citizens more prone to infections. Dust particles and pollutants can inflame the airways, which may allow viruses such as influenza to gain a foothold more easily than during periods of cleaner air. 

Health experts in the city also point out that the current surge is sharper than in past seasons. Pulmonologists say that after a relatively mild respiratory illness season in recent years, the body’s collective immunity to strains like H3N2 may be lower, leaving more people susceptible to infection.  

Hyderabad clinicians are urging the public to remain vigilant and wear masks in crowded indoor areas and public transport. Frequent cleanliness, handwash, and early medical attention if symptoms worsen are also advised. 

“It’s important for people to recognize that this isn’t just a simple cold,” the pulmonologist said.  

Doctors also highlight that good personal hygiene, proper cough etiquette, and basic preventive steps remain the most effective defence against this surge, as the city and surrounding regions brace for continued circulation of H3N2 and other seasonal respiratory viruses.