HIV test paper test four times within three months are negative, can not completely rule out AIDS, can only be considered as the possibility of infection is not large.
Test strips can not completely rule out AIDS infection, only to the local second-class hospital, third-class hospitals and the CDC to draw blood to check HIV antibodies is the most accurate results, can diagnose whether the infection of AIDS.
HIV test strips are negative four times in three months, although the test time has passed the window period of AIDS, but the test strips may have a certain degree of error, there are also some factors such as the use of the wrong, test strips expired and so on may affect the test results.
It is recommended that if you have risky behavior, you should go to the hospital immediately to confirm the test result after using the HIV test strip. If the result is still negative, HIV infection can basically be ruled out.
If the HIV test is negative four times within three months, you need to go to the hospital to confirm the diagnosis.