1. 病毒
A virus is a kind of germ that can cause disease.

2. 病毒
In computer technology, a virus is a program that introduces itself into a system, altering or destroying the information stored in the system.

1. (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

2. a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer

e.g. a true virus cannot spread to another computer without human assistance

Synonym: computer virus

3. a harmful or corrupting agency

e.g. bigotry is a virus that must not be allowed to spread
the virus of jealousy is latent in everyone