virulence

The quality of being virulent, or charged with virus.

Synonyms Poisonousness, venom, deadliness.

Asperity, Harshness. See acrimony.

The quality or state of being virulent or venomous; poisonousness; malignancy.

Extreme bitterness or malignity of disposition.

the state of being virulent

a measure of how virulent a thing is

extreme hostility

extreme harmfulness (as the capacity of a microorganism to cause disease)