500 Words Article about AIDS (native speakers only)

For our Internet portal, we will be needing continuous good and excellent authors. This assignment is a first (test) order and will help us classify your writing skills. Write a short informative article about the immune disease "AIDS". What is known about the origin of this disease. How is it passed on and what can a person do to protect him/her-self against it? Are there any known antidotes yet? Your article should be minimum 500, maximum 600 words. Because we are trying to get a broad picture of your skills, please pay close attention to structure as well as grammar and spelling.