By Dr. Priyanka Chaudhary Bindroo, Sr. Consultant Pulmonology & Geriatric Medicine, Pacific OneHealth, Delhi

It began with a fever, body ache and a cough. You assumed it was the flu. You took a day off, had some rest, drank warm fluids and waited for it to pass. But three days later, the fever is still there. Your cough feels deeper, your chest hurts when you breathe, and even walking to the bathroom leaves you unusually breathless.

Could it be more than flu?

This is a question worth taking seriously, especially during the winter months, when respiratory infections become common. Flu and pneumonia can look similar at first, but they are not the same illness.

Flu is caused by influenza viruses. It often begins suddenly, with fever or chills, body aches, headache, tiredness, sore throat and cough. Many people recover over several days, although the weakness can linger.

Pneumonia, on the other hand, is an infection that affects the lungs. The tiny air sacs in the lungs can become inflamed and fill with fluid or pus, making it harder for oxygen to pass into the bloodstream. Pneumonia may be caused by bacteria, viruses or, less commonly, fungi. It can also develop as a complication of flu.

So, how can you tell the difference?

There is no reliable home test that can distinguish flu from pneumonia. However, certain symptoms should make you more concerned:

• Breathing becomes difficult: Breathlessness, rapid breathing or feeling short of breath while doing ordinary activities needs medical attention.
• The cough changes: A cough may become more persistent and bring up mucus. Sometimes there may be chest discomfort when coughing or taking a deep breath.
• Fever refuses to settle: A high or persistent fever, or fever that returns after seeming to improve, should not be brushed aside.
• You feel unusually weak or confused: This is particularly concerning in older adults, who may develop pneumonia without the typical high fever.

One important point: not everyone with pneumonia has all these symptoms. Older people may show confusion, unusual sleepiness, poor appetite or a sudden decline in their ability to manage everyday activities.

Who should be extra careful?

Adults over 65, young children, pregnant women and people living with diabetes, heart disease, chronic lung conditions or weakened immunity are at greater risk of serious complications. For an older person, what looks like ordinary tiredness or a change in behaviour may be an early warning sign.

If you have difficulty breathing, persistent chest pain, confusion, bluish lips or severe weakness, seek urgent medical care. Do not wait for the fever to become unbearable. A doctor may recommend an examination, oxygen-level check, chest X-ray or other tests to establish the cause.

And please don’t start antibiotics on your own. Antibiotics do not treat flu viruses, and the right treatment depends on the cause and severity of the infection.

At Pacific OneHealth, respiratory concerns call for careful assessment, particularly when symptoms are worsening or the patient is elderly. Dr Priyanka Bindroo’s work across pulmonology and geriatric medicine reflects why age, existing health conditions and the full picture of symptoms matter.

The next time a cough refuses to behave like an ordinary seasonal infection, don’t just ask, “Is it flu?” Ask, “Could my lungs be involved?” Getting the right assessment early can make a meaningful difference.

(The author is Sr. Consultant Pulmonology & Geriatric Medicine, Pacific OneHealth, Dwarka, New Delhi.)