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A member asked:
How reliable is the hiv 4 gen test at 18 days?
2 doctors weighed in across 2 answers
There is a risk of false negative at less than 18 days -i.e. if negative that could be false( i.e. has not yet turned positive- has not yet seroconverted ) , if positive likely to be true. It is best to wait at least 1 months. https://www.medicalnewstoday.com/articles/323901
Answered 3/31/2023
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In a 2014 study researchers found the window period for fourth generation HIV test was around 18 days. If person took the test within 18 days of contracting HIV, they are likely to receive false negative . These test pick 99% at 6 weeks and 95%at 4 weeks. Testing earlier needs confirmatory testing three months as after the risk.
Answered 3/31/2023
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