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Centuries, people have tried to find the treatments of a lot of ilnessess to survýve. In the past, some diseases caused many people to lost their lives such as; plague, cholera and typhoid fever. However, thanks to the medical science, these ilnesses are not a problem for us. Nowadays, there is a virus which threats the men’s life and makes the mankind and the medical science cureless is called AIDS. HIV infects the new person everyday and become widespread. AIDS is caused by not only perverted sexual relations but also blood transfussion, moreover, the unsufficient knowledge about AIDS. The major cause of AIDS is people’s illeteracy. In some societies, people always avoided learning knowledge about sex because it is seen shameful and a taboo.
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