1. The doctor diagnosed measles.
    医生诊断出麻疹.

2. People are vaccinated against measles.
    人们接种麻疹疫苗。

3. Preventing one case of AIDS means preventing many future cases, while preventing a case of measles(麻疹) or malaria(疟疾) in Africa would have little effect on its spreading, since those diseases are already common in many countries.
    预防一例艾滋病意味着为以后减少许多例艾滋病。而在非洲，预防一例麻疹或疟疾病对于防止疾病的蔓延起不了多大作用，因为这些疾病在许多国家已经是常见病。

4. Measles is an infectious disease.
    麻疹是一种传染病。

5. Measles is an infectious disease.
    麻疹是一种传染病。