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The window period is the time between when a person comes in contact with HIV and when a HIV test would show a positive result.
The HIV window period really depends on the type of test that is used.
Currently in BC Canada we use a HIV antibody blood test that has a window period of up to 3 months but 95% of people would show a positive result by 6 weeks.
The rapid INSTI HIV test also has the same window period of 3 months.
Our old HIV antibody test we used to use a few years ago had a window period of 6 months but our current ones have a window period of 3 months.
One problem with the internet is that some sites do not review their content on a regular basis or old information is still available. This information may have been accurate at one time, but is now out of date as medical technology has advanced.
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This answer was posted on October 24, 2013