virus
/ˈvaɪrəs/
(virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein
中文释义：病毒；计算机病毒
The virus spread rapidly through the population, causing a global pandemic.
这种病毒在人群中迅速传播，引发了全球大流行。
Make sure to install antivirus software to protect your computer from viruses.
务必安装杀毒软件以保护电脑免受病毒侵害。