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Journal of AIDS & Clinical Research

ISSN: 2155-6113

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HIV Window Period

The window period is the time between HIV infection and when the test will give an accurate result. The window period refers to the time after infection and before seroconversion, during which markers of infection (p24 antigen and antibody) are still absent or too rare to be removable. Tests cannot detect HIV infection every time while the window period.

During the window, a person can be infected with HIV and be highly contagious while being tested negative.

The window period for a 4th generation antigen / antibody test is approximately four weeks. There is a three-month period after exposure for the confirmation result to detect more than 99.9% of infections

A negative result on a fourth generation test that is done four weeks after exposure is very likely to rule out HIV infection. The guidelines suggest that additional testing is generally not necessary unless exposure is considered to be a high risk of infection.

People at continuing risk of HIV infection should be advised to repeat the test at regular intervals

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