This is a terrible disease for which we do not yet have a cure. Nor do we have a vaccine. Meanwhile, the mortality rate for AIDS is 100 percent.
AIDS means that the immune system of a person has gone wrong. The immune system is the biological system in your body which fights off diseases. This system is composed mostly of what are commonly termed “white blood cells”.
These cells are the hunters in the body. When a virus, such as the common cold, invades the body, the white blood cells rush to the invader and kill it.
While these blood cells are busy killing an invader, the body’s immune system is said to “be under attack”. If another virus or bacteria enters the body at the same time as the white blood cells are busy fighting off an invader, the second attacker has a better chance of injuring the rest of the body’s system.
Scientists found the virus that causes AIDS and named it HIV.The HIV virus attacks the white blood cells and kills them, thus preventing these white cells from carrying on their important work of killing the other invading viruses.
We cannot tell if a person had an HIV infection just by looking at him. And here lies part of the problem about the spread of HIV infection among people. For at least the first few years after a person had contracted the HIV virus, there are no indications that the person had the HIV virus in his/her bloodstream.
However, during this time the person carrying the virus can pass it onto other people through intimate sexual relations or sharing blood with them.
Then how do we know if we have HIV or not? The answer is simple. Have an HIV blood test. This simple, painless AIDS test will take only a few minutes of your time, and if you are at all in doubt about whether you might have contracted the HIV virus, it is a life-saving endeavor.
be composed of 由 组成
mortality rate 死亡率
immune system 免疫系统
white blood cell 白细胞
pass onto 传给
life-saving endeavor 挽救生命的努力
仅仅凭肉眼观察，我们并不能分辨出一个人是否感染上了HIV。这也就是HIV能在两个人或更多 的人中得以传播的部分原因。因为一个健康的人感染上HIV病毒以后，至少在最初的几年里没有任何迹象表明 他/她的血液里有HIV病毒。
那么，我们怎样才能知道自己是否受到了HIV的感染呢？答案很简单：去做一个HIV血液检验。 这种简单的检验只需花你几分钟的时间。如果你对自己是否感染了HIV病毒心存疑虑，去做一个血液乃是救生 之举。