• virulent

    A virulent disease is very dangerous and spreads very quickly.

  • retrovirus

    any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA)

  • viral

    relating to or caused by a virus

  • virologist

    a specialist in virology

  • virulence

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

  • virus

    (virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts

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