Fourth-generation HIV virus testing device

Fourth generation (4th Generation) home tests such as DVOT are characterized by their ability to detect antibodies and the human immunodeficiency virus directly through the p24 antigen, making their result accurate early (often after 2-4 weeks of potential exposure). Here are the steps for using this type of blood sample-based test (finger prick): First: preparation before the test Disinfect the finger: use an alcohol swab to clean the sides of the finger and let it dry completely. Finger prick: remove the blade cover, then press it firmly on the side of the fingertip until you hear a "click." Collecting the sample: wipe the first drop of blood with a piece of gauze, then gently press to produce a second large drop. Use the pipette to draw blood up to the marked line (usually one or two drops). Placing the sample and reagent: put a drop of blood into the designated sample well (usually marked with the letter S). Immediately add 2 to 4 drops of the buffer solution into the same well. Timing: start the timer and wait the specified time (usually between 15 to 20 minutes). Third: reading the result Negative (-): only one line appears at the (C) letter. This means no infection (considering the window period). Positive (+): two lines appear, one at (C) and the other at (T), even if the line is faint. In this case, a doctor should be consulted for a confirmatory laboratory test. Invalid: if no line appears at (C), the test is invalid and should be repeated with a new device. Important alerts: Do not read the result after more than 20 minutes as it may become misleading. Despite the accuracy of the fourth generation, some prefer to re-test after 6 weeks or 3 months to get a definitive result and to surpass the "window period."