sick的名词是：sickness意为“生病的人”
例：Take care of the sicks. 照顾病人。 但不常用，一般用patient。
相关介绍
In fifty-two years of working he had one week of sickness
在52年的工作中他仅病过一周。
27 million working days are lost each year due to work accidents and sickness
每年有2,700万个工作日因为工作事故和病假而损失掉了。
The official reason given for the President's absence was sickness.
对外公布的总统未到场原因是身体有恙。
