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A member asked:
What is the window period for modern day hiv 4th generation tests. many hiv specialists consider this conclusive at 28 days.? and cdc says 3 months?
A doctor has provided 1 answer
Concensus is 4 weeks: Both biological principles of the test and expert opinion favor 28 days. Few if any HIV experts report ever having a patient with new HIV who didn't have a positive 4th generation test by 4 weeks. The main exception may be when post exposure prophylaxis with anti-HIV drugs is given but doesn't work. Even then, it's probably rare. Many official agencies take conservative stances and always have.
Answered 11/21/2020
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Related Questions
A member asked:
The CDC has cryptic language when it comes to what day the 4th gen ag/ab lab test is conclusive. It says the 4th gen lab test should be taken after the window period which is 18 to 45 days. So should I take the test at 46 days? Is it 100% conclusive?
2 doctors weighed in across 2 answers
A member asked:
What is the criteria used by cdc behind calculating window period for hiv? And why it is 90 days?
A doctor has provided 1 answer
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