Are HIV tests accurate?

I've done some reading and according to the Centers for Disease Control and Prevention, the tests don't look for HIV, rather, they look for antibodies.

"Once HIV enters the body, the immune system starts to produce antibodies 鈥?(chemicals that are part of the immune system that recognize invaders like bacteria and viruses and mobilize the body's attempt to fight infection). In the case of HIV, these antibodies cannot fight off the infection, but their presence is used to tell whether a person has HIV in his or her body. In other words, most HIV tests look for the HIV antibodies rather than looking for HIV itself."

http://www.cdc.gov/hiv/topics/testing/re...

According to what they're saying, if you have antibodies present in your body when you get tested, your test will come out positive.

Since the same antibodies are used to fight off other virus' and bacteria, how can the tests give accurate results?

In response to Jay Jay: Here is an example:

http://news.xinhuanet.com/english/2007-1...

As with any testing there is always room for error. HIV testing is 99.6% accurate. As for the antibodies there are medical conditions that will give a false positive, Lupus is one illness that will do this. And there is always human error, but the two items are very rare.

When you body develops antibodies, they are very specific to an illness.

Your body develops specific antibodies to fight off each individual infection it contracts, it's not a "one antibody fights all" situation. So if you have antibodies to HIV in your blood, it means that you DO have HIV. The only time this may be false is in newborn babies - if they have a mother who is HIV positive, they will have her antibodies in their blood stream for up to 18 months after birth. At 18 months old they should be tested for HIV, not before.

http://video.google.com/videoplay?docid=...

I DON'T KNOW BUT SO FAR THEY ARE PRETTY ACCURATE I MEAN HOW OFTEN DO YOU HEAR ABOUT SOMEONE BEING TOLD THEY HAVE IT AND YEARS LATER FINDIN OUT THEY NEVER EVEN HAD IT???