People with contagious diseases should be isolated.

传染病患者应予以隔离。

Zack Lemann, Visitor Programs Manager at the Audubon Insectarium, goes on to explain the exhibits with contagious enthusiasm.

查克黎曼是奥杜邦昆虫馆访客计画负责人，他用有感染力热情来解释了这些展览。

He's got a contagious laugh.

他有感染力。

It's a highly contagious infection.

这种病极易传染。

Her laughter's contagious!

她声于感染力！

Yawning is often contagious.

打哈欠常易于感染。