A cough that won't quit after three weeks deserves more than another syrup

Finding out whether a stubborn cough is TB is straightforward and, at a government centre, free. Costs below are rough India ranges for private labs and shift by city, lab and scheme.

The tests

• Sputum microscopyroughly ₹100–300 privately. You cough up phlegm into a cup; the lab looks for TB germs. Cheap, but can miss milder cases.
• CBNAAT / GeneXpert (molecular test)roughly ₹1500–2500 privately, free at government centres. Fast and far more sensitive — and it also flags whether the TB is drug-resistant, which decides the treatment.
• Chest X-rayroughly ₹300–600. Shows the damage TB leaves in the lungs; often paired with sputum.
• Mantoux / IGRA blood testmainly for latent TB, usually when checking close contacts, not for the active cough itself.

The free route worth knowing

• Under the National TB Elimination Programme (Ni-kshay), diagnosis and the full medicine course are free at any government health centre — no referral needed, just walk in with that long cough.

Red flags — see a doctor without waiting

• Cough over two weeks, evening fever, night sweats, weight or appetite loss — and any blood in the sputum means see a doctor the same day.

The smartest move is not memorising test names. It is simply not letting a cough past two weeks slide, and asking your doctor whether a sputum test or CBNAAT makes sense for you.

Myth 1 — TB means certain death.

Not anymore, and not for a long time. With the standard medicine course, the large majority of people are cured completely and return to a normal life. The danger today is not the germ — it is delay and stopping medicines early.

Myth 2 — You catch TB by touching a patient or sharing their plate.

No. TB spreads only through the air, from droplets when a person with untreated lung TB coughs. You do not get it from sharing food, utensils, a handshake or a hug. Once someone is on proper treatment, they usually become non-infectious within a couple of weeks.

Myth 3 — Only the poor or the unclean get TB.

Untrue and unkind. TB is an airborne germ; anyone who breathes it in can be infected, whatever their income or hygiene. Diabetes, in fact, raises the risk — and that cuts across every class.

Myth 4 — TB is hereditary, it runs in families.

It is not passed in your genes. Families share it only because they share air and rooms — close contact with an untreated patient — not bloodline.

Myth 5 — Once the cough goes, you can stop the pills.

The most dangerous belief of all. You feel better in weeks, but the germ is still alive inside. Stop early and the surviving bacteria return stronger, now drug-resistant (MDR-TB) — far harder to treat. Finish every dose, even after you feel fine.

You do not need to panic, and you certainly do not need to hide it. You need to act at the right moment, and the plan is simple and stepwise.

Remember this is information and encouragement, not a diagnosis. See a doctor whenever a cough crosses two weeks — and the same day if you ever see blood in the sputum.

Step back, and TB in India is a strange kind of story — the country carries the world's heaviest TB load, yet the disease is fully curable and diagnosis and medicines are free for the asking. The gap between those two facts is almost entirely about time. The lesson here is not fear; it is that a cough left to drag for months turns a curable illness into a hard one, and quietly lets the germ pass to someone else.

What makes this hopeful is how much sits in ordinary hands. You do not need a specialist or money to begin — you need to notice the calendar. Two weeks of cough is a simple, memorable line. Cross it, and the next move is a test, not another trip to the chemist. Districts that found cases early and made people finish treatment have watched TB fall, case by case.

The deeper point is agency over silence and shame. TB is no verdict on your character or cleanliness, and hiding a cough only buys the germ more time. Telling a doctor, finishing the full course, getting close family checked — these are acts of care, for everyone who breathes the same air.

The future of your lungs, and the safety of those around you, can turn on counting to fourteen days and walking into a clinic. If your cough has crossed that line, that one honest appointment is the small first step worth taking now.