chiv

例句：

1. 1. The new vaccine was designed to protect against chiv infections.
   新疫苗被设计用来预防病毒感染。
2. 2. Chiv is a common cause of gastroenteritis in children.
   儿童常见的肠胃炎原因之一是病毒。
3. 3. Researchers have been studying the effects of chiv on human health for decades.
   研究人员已经研究了几十年病毒对人类健康的影响。