I was a precocious actress in her eyes; she sincerely looked on me as a compound of virulent passions, mean spirit, and dangerous duplicity.
When the typhus fever had fulfilled its mission of devastation at Lowood, it gradually disappeared from thence; but not till its virulence and the number of its victims had drawn public attention on the school.
There are no more uses of "virulent" in the book.
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A virulent form of the infectious disease spread through the country.
The increasingly virulent tone of the campaign had all but the most hateful and partisan tuning ignoring the discussion.