HIV

Fourth generation test at six weeks. Is that it?

Negative at six weeks on a lab test. I have read four weeks, six weeks, twelve weeks and ninety days in various places and I cannot settle.

low_ceiling 2 months ago

NoteMember experience, not medical advice. Symptoms overlap between infections and only a test can tell them apart.

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open_window 2 months ago

For a laboratory fourth generation test, the number used in UK guidance is forty five days, after which a negative is treated as conclusive. Six weeks is right on that line.

At four weeks the same test already picks up the large majority of infections, so a negative at six weeks is a strong result rather than a provisional one.

west_pier 2 months ago

The ninety day figure you have seen applies to rapid tests and self tests, not to lab tests. They have a longer window because fingerprick blood and oral fluid lag behind plasma.

So the right number depends on which test you had, which is why the internet appears to contradict itself.

ninth_street 2 months ago

Ring the clinic and ask them to state whether your result is conclusive for the exposure you are worried about. Hearing it said about your specific test and your specific date is worth more than any amount of reading.

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