|3 month test
May 22, 2003
is it 99.99 accurate at 12(84 days) weeks
thanks, doing a great job.
| Response from Mr. Kull
From the New York AIDS Institute:
"The detection of antibodies specifically recognizing HIV is the most common way to diagnose HIV infection in adults and children >18 months old. These antibodies are usually detectable within 3-6 weeks after infection, and almost all individuals seroconvert by 12 weeks. In rare cases, antibodies may not be detected for months or years.
Virtually all seroconversions are complete within twelve weeks of exposure. Improvements in HIV testing technology over the last fifteen years, increasing laboratory experience with testing and the ability to better monitor early infection through PCR testing have contributed greatly to our understanding of the window period and have provided increased confidence that virtually all cases of HIV infection can be detected by three months.
It is possible that someone who tests negative four weeks after an exposure may be infected but his/her body has not had sufficient time to develop antibodies. Therefore, to rule out HIV infection, it is important to re-test three months after the exposure. It is extremely rare for an HIV-infected individual to not develop antibodies by three months. An individual who tests negative three months after an exposure does not require further testing unless he/she may have repeated exposures or if their antibody test results are incompatible with their clinical history." (NY AIDS Institute)
The CDC also officially modified its recommendations, stating that testing at three months was sufficient unless clinical history suggested further testing was necessary.
HIV antibody screening assays have a greater than 99% accuracy, making it one of the most reliable tools for detection of infection in medicine.
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