o chorobie silna złośliwa in inglese:

virulent form of the disease

The executive chairman of Breitbart has himself described his role there as "virulently anti-establishment", views that have led the website into staunch support of Mr Trump.

L'avocat fait une plaidoirie très virulente.

The E. coli bacteria are so virulent that it takes no more than a few of tchem to cause deadly infection.

The reaction in Germany against Strauss was virulent