How a cell infected by a virus signals cytotoxic T lymphocytes to kill the cell before the virus replicates and spreads.
HIV's reverse transcriptase mistakes AZT for thymidine. Once incorporated, AZT stops reverse transcription.
How HIV infects a cell and replicates itself using reverse transcriptase and the host's cellular machinery.
Protease inhibitors prevent maturation of viral proteins inside HIV particles.
A visual representation of the U.S. AIDS epidemic from 1981 to 1997. Each dot represents 30 cases.