Anonymous
Hi There, 

Im researching window periods and I'm getting different answers. I went in to get my test done 10 days after possible exposure. I'm seeing multiple sites that are basically telling me I will get a false negative result from that (even if its a NAT test). 

https://wwwn.cdc.gov/hivrisk/how_know/window_period.html 

The CDC says a NAT test will be good for MOST people if done between 7 -28 days... 

If my test comes back and it's negative will I be able to trust that result? 
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helpline-volunteer

Hello,


Thank you for your inquiry. From what we gather from the question, you were asking about the window period of a nucleic acid amplification test (NAT or NAAT) after a possible HIV exposure.

A NAAT test can detect the presence of the HIV virus as early as 7 to 14 days post-exposure (1). The test you accessed may have given you an accurate negative result, but it is important to get re-tested with an antibody test outside of the window period for conclusive results. Most guidelines and physicians recommend re-testing 3 months post-exposure with an antibody test for completely conclusive results.

Recommendation: Refer to a health care provider for an HIV antibody test outside of the window period after engaging in a low or high risk activity.

Regards,
AIDS Vancouver Helpline/Online, Marie

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