Delivering a single virus to a cell allows the virus to infect the cell, replicate, and give rise to many progeny viruses. These viruses can then infect many neighboring cells.
The geometric structures of viruses are beautiful and can be used, along with genomic information, to identify them.
A visual representation of the U.S. AIDS epidemic from 1981 to 1997. Each dot represents 30 cases.
HIV's reverse transcriptase mistakes AZT for thymidine. Once incorporated, AZT stops reverse transcription.
When two different strains of influenza infect a single cell, their genetic material can mix freely, resulting in a new third strain of influenza.
Dengue virus has sophisticated mechanisms for entering a cell, for replicating its RNA genome, and for translating proteins.
The dengue virus's outer envelope proteins form symmetrical units and overlay the lipid envelope, capsid, and the RNA genome.
Infection begins when the dengue virus uses receptors on an immune cell's surface to gain entry and release its genome.
How HIV infects a cell and replicates itself using reverse transcriptase and the host's cellular machinery.