2016-2017学年 人教版 选修6 unit3 A healthy life using language 课件 (14)
2016-2017学年 人教版 选修6 unit3 A healthy life using language 课件 (14)第4页

What is the difference between HIV and AIDS?

HIV is a virus that can live in the body for some time – occasionally many years – without symptoms being present. Even though they may not be showing symptoms, a person with HIV can infect others.