Delhi confirms H3N2 cases: How and where to get tested

H3N2 flu cases are rising in Delhi and the surrounding NCR region this season. A recent survey reported that nearly 69% of households in the area have at least one person experiencing flu-like symptoms this month. Seasonal weather changes, high air pollution, and weakened immunity have all contributed to this increase. Crowded public spaces, public transport, and social gatherings also make it easier for the virus to spread.

In my opinion, understanding how H3N2 spreads and why testing is necessary can help residents protect themselves. H3N2 is a subtype of influenza A, which mutates frequently. This means people can get infected even if they have had flu before. The virus spreads mainly through droplets when an infected person coughs, sneezes, or talks. It can also spread through touching contaminated surfaces and then touching the eyes, nose, or mouth.

Symptoms of H3N2 flu are similar to seasonal flu, which makes it difficult to identify without proper testing. Most people experience fever, cough, sore throat, body aches, fatigue, and nasal congestion. In severe cases, people may have difficulty breathing, persistent chest pain, dizziness, or worsening cough, which could indicate pneumonia. Symptoms typically last 5–7 days, though fatigue and cough may persist for up to two weeks.

Testing is crucial for early detection. The RT-PCR test is the most accurate method for confirming H3N2. It identifies the virus’s RNA from throat or nasal swabs. Rapid influenza diagnostic tests (RIDTs) are faster, giving results in 15–30 minutes, but they are less accurate. While COVID-19 tests also use RT-PCR, H3N2-specific tests target influenza A subtypes only.

Delhi residents can get tested at government hospitals like AIIMS and Lok Nayak Jai Prakash Narayan Hospital (LNJP), which offer tests at subsidised rates. Accredited private labs such as SRL Diagnostics, Apollo Diagnostics, Max Lab, Ganesh Diagnostic, and Redcliffe Labs also provide H3N2 RT-PCR and rapid tests. Many of these labs now offer home sample collection, which is convenient for those who should avoid travel while sick.

High-risk groups—children, elderly, pregnant women, and people with chronic illnesses such as asthma, diabetes, or heart disease—should get tested immediately if symptoms appear. Early testing allows for timely treatment and prevents serious complications. Healthy adults with mild flu may recover at home without testing unless their condition worsens.

Prevention and treatment should go together

Testing alone is not enough; prevention is equally important. Seasonal flu vaccination is recommended, particularly for high-risk groups. Good hand hygiene, wearing masks in crowded or poorly ventilated areas, covering the mouth and nose while sneezing or coughing, and keeping indoor spaces well ventilated can help reduce the risk of infection. Anyone with symptoms should stay home to avoid spreading the flu to vulnerable people.

If a person tests positive for H3N2, treatment focuses on managing symptoms and preventing complications. Doctors may prescribe antiviral medications if the infection is caught early. Fever reducers and pain relievers help manage discomfort. Supportive care, including rest, hydration, and nutritious food, is essential for recovery. Severe cases may require hospitalisation and oxygen support, especially if breathing difficulties develop. Home remedies like steam inhalation, gargling with warm salt water, and using humidifiers can help relieve mild symptoms.

In my opinion, taking extra precautions like using air purifiers, maintaining clean indoor environments, and avoiding crowded spaces during flu season can further reduce exposure to H3N2. Combining testing, preventive measures, and timely medical care forms a complete approach to fighting the flu and protecting public health.

H3N2 differs from other flu strains such as H1N1 (swine flu) and regular seasonal flu. While H1N1 caused a global pandemic in 2009, H3N2 causes recurring seasonal outbreaks with frequent mutations, leading to more hospitalisations in vulnerable populations. Its unpredictable nature requires continuous monitoring and careful management to prevent large-scale outbreaks.

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Raising awareness about H3N2 is critical. Many people may ignore mild flu symptoms, thinking it is just seasonal illness. However, the virus can cause serious complications if not detected or treated early. Understanding testing options, preventive practices, and treatment guidelines empowers residents to take informed decisions and reduce the risk of severe illness.

In conclusion, H3N2 flu testing, early treatment, and preventive measures should all go hand in hand. RT-PCR and rapid tests help identify the virus accurately, while vaccination, hygiene practices, and timely medical care prevent complications. Staying vigilant during seasonal changes and high pollution periods is key to protecting both individual and public health.