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P24 testing and window question Feb 9, 2003 Dear David, I have read that P24 antigen testing can be carried out prior to antibodie testing, sometimes as early as 2 to 3 weeks after infection, I also understand that the P24 Antigens have a small window when they are present, can you confirm that it is usual that the antigens remain detectable until the antibodies are detectable? I have had a negative HIV antigen and antibodie test after the 3 month window ( 20 weeks ) and am trying to decide whether to take another test at 6 months. Please reply as I am still worried and am looking for some confirmation that either antigens or antibodies would be present at this time. Thanks for reading my question. Regards |
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| Response from Dr. Wohl
 At this point, your HIV antibodies should be present if you were infected 3 months ago. The p24 may not be detectable. With newer generation HIV antibody tests, a negative result at 3 months is negative. If any doubt remains, a test at 6 months can be done. IF negative then, you are finished. DW | ||||||||
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