If you are asking "How conclusive is the 8-week HIV test?" you might be experiencing a pretty scary time in your life right now. You can ease some of your concerns because there are tests available for you.

In the scientific community, there is still a little bit of debate going on about how conclusive the 8-week HIV test is exactly. However, in general, it is agreed upon that by 8 weeks, the HIV test is almost 100% accurate.
Eight weeks can seem like a very long time when you are waiting, but it is best to wait longer to ensure that your results are accurate. If you wait until the eight week time period, there is a decent chance that your results will be more accurate than if you take the test any sooner. Of course, if you want to be entirely sure, you should wait until the 12 week mark.
Therefore, while the eight-week HIV test is quite accurate, there is another one that is more accurate, and it may be beneficial for you to wait that extra period of time. Again, we realize that having to wait so long produces a stressful and anxiety ridden life for you. Yet the longer you wait, the more you can be comforted that you are getting the correct answers and results from your examination.
There are some steps you must take in order to ensure that the HIV test is as accurate as possible. You do not need to do any massive preparations, but there are some common sense items that you should know.
Since you are probably extremely anxious to know the results, you might consider taking a test earlier than the eight week mark. Four-week and six-week tests are available. However, the six-week test is about 95% accurate, and the four-week test is about 85% accurate. Yes, those are high percents, but wouldn't you rather just wait until you can be certain?
If you must know right away whether or not you have HIV, there is another option. Consider taking the four or six-week test so that you have a decent idea of whether or not you have contracted the disease. You must remember that these results are not entirely accurate, but they are close. You will probably have at least some peace of mind at this point. When eight or 12 weeks have passed, take it again to be sure.