How to use "virulent" in a sentence

Pancreatic cancer, exceedingly virulent

they're now supposed to be our new friends, but they keep developing bacteriological weapons, new and more virulent strains of viruses, because they're broke, and this is a lot cheaper than other weapons systems

And like syphilis, Wuhan-400 can't survive outside a living human body for longer than a minute, which means it can't permanently contaminate objects or entire places the way anthrax and other virulent microorganisms can