Window period creates testing blind spots The window period represents the time between HIV exposure and when your body produces enough antibodies or antigens for tests to detect infection. This ...

The window period is the time between your exposure to the virus and when your body produces enough antibodies for the test to detect. In most cases, your immune system takes about three weeks to ...

In Chiang Mai, Thailand, in 1992–1993, when the window period before antibody detection was much longer than it is now, seven out of 44,446 donors were p24 antigen positive and anti-HIV negative.