Virulent

One can't discount a global disaster like a virulent plague.

Ebola is one of the most virulent viruses known to man.

There are seven coronaviruses that can affect people. The common cold is one, as are its more virulent cousins: SARS, severe acute respiratory virus, and MERS, Middle East respiratory virus.

Parisians marked dusk on the first day of their coronavirus lockdown this week by stepping out on their balconies and throwing open their windows to cheer and applaud the front-line fighting of doctors and nurses of the virulent viral enemy that has upended life around the world.

The virulent plague ravaged the whole planet, as many places became ghost towns.

Scientists at the University of Wisconsin, Madison, and the Erasmus University Medical Center in the Netherlands engineered a more virulent strain of the H5N1 bird flu to try to understand how mutations could make it more infectious to both animal and human populations — a change that could lead to a global pandemic.

The politicians were virulent in their hatred of the president.

More venemous and much more virulent / Then any poyſoned tode, or any ſerpent.

It was a casual sneer, obviously one of a long line. There was hatred behind it, but of a quiet, chronic type, nothing new or unduly virulent, and he was taken aback by the flicker of amazed incredulity that passed over the younger man's ravaged face.

They were targeted by a virulent strain of nativism toward those from Southern and Eastern Europe that was largely about race.