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A 31-year-old male asked:

hiv-cdc say 3 to 6 mths, bashh say 4 to 8 wks, who say 6 wks. all these for same combo test to be conclusiv. is who and bashh wrong and cdc right?tks

1 doctor answer2 doctors weighed in
Dr. Jessica Allan
Internal Medicine 23 years experience
Complicated window: Each organization has its own set of Algorithms that it has set up and follows. HIV antigen is a protein produced by the virus immediately after infection. Antibodies (the body's reaction to the virus as it fights off infection) can take up to 3-4 wks The combo test can capture most positives. However pregnant women, kids, pts whose bodies take longer to produce antibodies. Timing varies.

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