This composition about AIDS prevention is about 600 words.

AIDS has become a topic of common concern to people all over the world. How to prevent AIDS has become a topic of concern to everyone. Everyone knows the horror of AIDS and calls it "the devil". So, what kind of "devil" is AIDS? Generally speaking, AIDS is a serious infectious disease, and the human immune system is destroyed by a virus called "HIV", so the body loses its resistance and cannot fight against those life-threatening germs, thus causing many incurable infections and tumors in the human body, and eventually leading to the death of the infected person. According to UNAIDS estimates, 1998 has infected more than 3 million children and adolescents worldwide, including1590,000 children under 5 years old and12.5 million adolescents aged 5-24 years old. It is estimated that about half of the HIV-infected people in the world were infected with HIV during the age of 15-24, and the proportion of teenagers aged 12- 19 is increasing. Teenagers are a period of great physical and psychological changes in life. On the one hand, they are at the second peak of their physical development and begin to show curiosity and sexual germination to the opposite sex. On the other hand, with the growth of knowledge and ability, they have more dreams and the desire to realize their dreams. It is these physiological and psychological characteristics of teenagers that determine their strong curiosity and willingness to accept and try all kinds of thoughts, concepts and behaviors, including some behaviors related to HIV infection and AIDS, such as sexual behavior and drug abuse. Here, what deserves our attention is that teenagers are not only a susceptible group, but also a resource and strength. They are not only the future of the world, but also a new force in the fight against AIDS. Teenagers are the best stage to learn and accumulate knowledge. During this period, if they can acquire the necessary knowledge, beliefs, attitudes, values and skills, they can help teenagers to establish a behavior that is conducive to the healthy development of body and mind, thus avoiding some dangerous behaviors that may lead to AIDS. When some teenagers master the correct corresponding knowledge and skills, they will become good communicators of information and benefit the people around them. If young people have the opportunity to directly participate in AIDS prevention and control activities, it is an effective strategy to mobilize society to prevent and control AIDS. AIDS threatens every family and everyone, so it is the responsibility of the whole society to prevent AIDS. In this war without smoke and cruelty, we should understand that if we want to defeat it completely, we must raise our ideological consciousness, save the people who are degenerating and sound an alarm for the careless. Yes, we always believe that it will end in extinction, but at the same time, we also want to appeal to everyone to look at it soberly, so that it will not degenerate, ignore or be intimidated by it, even if your name is AIDS. Let's prevent AIDS, cherish life and believe that the dawn of victory is no longer far away.