世界银行曾有预言-到2000年将有120万的巴西人会携带引起艾滋病的人体免疫缺损病毒(HIV)，但巴西的预防措施却能够将病毒的携带人数减少一半。
The World Bank predicted that by 2000 1.2m Brazilians would carry HIV, the virus that causes it, but prevention schemes have held the number to half that.
艾滋病是由人类免疫缺损病毒(HIV)引起的。该病毒侵袭人体的免疫系统，使得机体容易患各种能威胁生命的疾病和癌症。
The cause is Human Immunodeficiency Virus (HIV), which attacks the immune system and leaves the body vulnerable to a variety of life-threatening illnesses and cancers.
有些感染HIV的人在接触艾滋病病毒和艾滋病发病之间的几年内没有任何症状(HIV：人体免疫缺损病毒)。
Some people with HIV infection remain without symptoms for years between the time of exposure and development of AIDS.
艾滋病病毒是指人体免疫缺损病毒。
艾滋病病毒是指人体免疫缺损病毒。
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