It does not mean that the severity of the situation has increased or that people are getting seriously sick at higher numbers or higher rates than they are right now."

VOA: special.2009.06.10

What if you're talking about a group of people that don't have any cows in their vicinity, let alone a sick cow?

万一你遇到一群人,他们附近连头奶牛都没有,更不用说受病毒感染的奶牛

耶鲁公开课 - 生物医学工程探索课程节选

That little J shaped curve is explained primarily by cigarette smoking because that keeps weight down in people, it also makes people sick so that their weight gets low because of that, and it explains the high rates of the disease risk there.

这个小J形曲线主要是由吸烟引起的,因为吸烟一方面能让体重降低,另一方面也引起疾病,疾病让人们的体重下降,这也解释了这里的高患病风险

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Many people can live with the virus and never get sick, but 25 percent of those infected eventually develop severe liver damage or cancer.

VOA: standard.2010.07.26

(SAYING) He says he was shocked to learn that when the Khmer Rouge took power,they emptied out the capital Phnom Penh at gun point and sent millions of people, including the old and sick, to toil in the countryside.

VOA: standard.2010.04.19