沾染zhān rǎn
be infected with; be contaminated by; be tainted with
原声例句
VOA慢速英语_科技
This requires viruses to infect living organisms.
这需要病毒感染生物体。
研究生学术英语读写教程
A disease is Contagious if it is caused by some type of infecting organism that is spread human to human. Not all diseases involve an organism and not all organism involved diseases are transmitted person to person.