HIV/AIDS：ARE YOU AT RISK?
HIV is a virus．A virus is a very small living thing that causes disease．There are many different viruses，for example，the flu virus or the SARS virus．HIV weakens a person's immune system；that is，① the part of the body that fights disease．You can have HIV in your blood for a long time，but eventually HIV will damage your immune system so much that your body can no longer fight disease．This stage of the illness is called AIDS．If you develop AIDS，your chances② of survival are very small．
人体免疫缺损病毒/艾滋病：你是否面临危险？
HIV(人体免疫缺损病毒)是一种病毒。病毒是一种可以引发疾病的微生物。它有许多种类，如流感病毒和SARS病毒。HIV病毒损害人体的免疫系统，也就是说使人体抗衡疾病的免疫功能减弱。在你的血液中，HIV病毒可以长期存在，但是它最终会使你的免疫系统严重受损，以至于你的身体再不能抗衡疾病。这种疾病到了这个阶段就叫艾滋病。如果你发展成了艾滋病，生存的几率很小。
