Fever & infections
Dengue NS1 Antigen72% off
A dengue viral protein present early in infection
- Blood
- Same day / 24 hours
- Home pickup
₹689₹2,499
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Dengue tests compared
The right dengue test depends entirely on which day of fever you are on. Get this wrong and the result misleads.
The bottom line
Timing decides everything. In the first 1–5 days of fever, book the NS1 antigen — it is positive earliest. From about day 5 onward, NS1 starts to fade and the IgG/IgM antibodies become the useful test. If you are unsure of the day or want the safest single booking in the first week, many doctors advise NS1 plus IgM together. This is guidance, not a diagnosis — see a doctor for any high fever.
You're in the first 1–5 days of fever.
See price & bookPick IgG / IgM AntibodyYou're past day 5, or checking a past/recent infection.
See price & bookDengue tests detect different things at different stages. NS1 is a viral protein that appears in the blood almost as soon as fever starts and stays detectable for roughly the first five days. That makes it the earliest and most useful test in the acute phase.
IgM and IgG are antibodies your body makes in response — they take several days to rise, so they are often still negative in the first few days and become informative later in the illness. Booking an antibody test too early, or NS1 too late, is the commonest reason a dengue test 'misses'.
| NS1 Antigen Best days 1–5 of fever | IgG / IgM Antibody Useful from ~day 5 | |
|---|---|---|
| Best in first 1–5 days | Yes | Often too early |
| Best from day 5 onward | Fading | Yes |
| What it detects | Virus protein (current) | Antibodies (response) |
| Confirms recent infection later | No | Yes |
| Fasting needed | No | No |
A dengue viral protein present early in infection
Save ₹1,810
Heads up: Sensitivity drops after about day 5
Antibodies the body makes against dengue
Save ₹120
Heads up: Often still negative in the first few days
Free home collection
A phlebotomist visits at your chosen time.
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Digital reports, usually within hours.
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A registered doctor reviews your symptoms and history, tells you exactly which test you need, and interprets the results with you.
This page is general information to help you choose a test, not a diagnosis or medical advice. Lab results should be interpreted by a doctor alongside your symptoms and history.