diseases
A disease is an illness which affects people, animals, or plants, for example, one which is caused by bacteria or infection.
the rapid spread of disease in the area.
疾病在这一地区的迅速传播。
illnesses such as heart disease.
诸如心脏病之类的疾病。
Doctors believe they have cured him of the disease.
医生们相信他们已经治好了他的病。