How to use HIV test strips: First, uncover the protective layer of HIV test strips; Second, you need to know the HIV test strips, HIV test strips are divided into three zones, which are the spiking zone, the testing zone and the quality control zone; Third, you need to judge the HIV test results, after adding blood and buffer, you need to wait for about 20 minutes, according to the displayed results, determine whether the HIV infection virus, if it is negative, only the quality control area shows a red line, the rest will not be displayed; if it is positive, both the detection area and the quality control area show a red line; if there is no red line in the quality control area, it proves that the test is invalid. It is worth mentioning that if the time is longer, more than 30 minutes later, the blood may stain the test paper red, and does not affect the result of the judgment, because the display result appears as a regular red line.