Definiciones
1.AdjectiveOf animals, plants, or substances: extremely venomous or poisonous.
2.AdjectiveExtremely hostile or malicious; intensely acrimonious."The politicians were virulent in their hatred of the president."
3.AdjectiveOf a disease or disease-causing agent: malignant, able to cause damage to the host.
4.AdjectiveOf a pathogen: replicating within its host cell, then immediately causing it to undergo lysis. .mw-parser-output .defdate{font-size:smaller}