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  • Infection Engines

    Infection Engines

    Image of the Week

    A group of intracellular tachyzoites of the toxoplasmosis-causing parasite Toxoplasma gondii.

  • Dengue Virus Enters a Cell

    Dengue Virus Enters a Cell

    Animation

    (1 min 33 sec) Infection begins when the dengue virus uses receptors on an immune cell's surface to gain entry and release its genome.

  • HIV life cycle

    HIV life cycle

    Animation

    (4 min 52 sec) How HIV infects a cell and replicates itself using reverse transcriptase and the host's cellular machinery.