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Accuracy of 4th generation/ duo hiv test?

What is the accuracy of the 4th generation or duo test? And at how long is it conclusive?
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Thanks you two very much you did a lot too ease my mind.
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12 weeks, 3 months is all you need.
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http://www.cdc.gov/globalaids/Resources/pmtct-care/docs/TM/Module_6TM.pdf
Page 11
#4
  In an adult, a positive HIV antibody test result means that the person is infected, a person with a negative or inconclusive result may be in the “window for 4 to 6 weeks but occasionally up to 3 months after HIV exposure. Persons at high risk who initially test negative should be retested 3 months after exposure to confirm results
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Well a lot of the information online is different. Some say 3 months and some say 6 months on the antibody test. Idk I'm just worried and I want to be for sure.
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Very accurate anytime after 4-6 weeks, but not conclusive. A standard antibody test at 12 weeks is for now the only conclusive test.
But from your previous post you already had a test past the window period.
Why would you still be worried?
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