F5 Bio Virus? Pathogens?

A pathogen (病原體) or infectious agent — colloquially, a germ — is a microbe or microorganism such as a virus, bacterium, prion, or fungus that causes disease in its animal or plant host.
A virus (病毒) is a small infectious agent that can replicate only inside the living cells of organisms.
因此，virus 一定是 pathogen，但 pathogen 不一定是 virus！