It is not possible to infect another person through kissing.

接吻不可能把这种病传染给他人。

《牛津词典》

Once ingested by a caterpillar, the crystals dissolve, releasing the virus to infect the insect's cells.

一旦被毛虫摄入，晶体就会溶解，释放出病毒感染昆虫的细胞。

youdao

Ebola was so deadly and killed so quickly that within a short period of time, there was no one around to infect.

埃博拉病毒十分致命，致死速度极快，以至于在短时间内，周围没有健康的人可以再被病毒感染。

youdao

But,it usually finds more susceptible populations to infect among the people who did not get the disease in the first wave.

VOA: standard.2009.09.04

The virus is not killed so It's a live virus, which is actually going to infect your intestinal system and reproduce.

病毒没有被杀死,那么它就是活性病毒,也就意味着它将会,侵入你的肠道系统并且会繁殖

耶鲁公开课 - 生物医学工程探索课程节选

Usually viruses have certain kinds of cells they want to infect or that they're capable of infecting.

通常病毒倾向于或者有能力,感染某些种类的细胞

耶鲁公开课 - 生物医学工程探索课程节选

Even more alarming, resistant bacteria are breaking out to infect healthy people outside the hospital ward.

FORBES: Germ Warfare

Rieger points to signs that Stuxnet was engineered to infect systems as early as January 2009.

FORBES: Theories Mount That Stuxnet Worm Sabotaged Iranian Nuke Facilities

The problems, and the confusion they caused, threatened to infect the rest of the banking system.

BBC: RBS computer failure needs clear redress, says MP