不要碰那个伤口，它可能已经感染了。

Don't touch that cut, it might be ___infected.

她的快乐情绪很快就被周围人的抱怨所影响。

Her cheerful mood was quickly ___infected by everyone else's complaints.

我的U盘感染了病毒，现在无法读取文件。

My USB drive is ___infected with a virus and now can't read files.