In Mission: Impossible II, the genetically engineered virus is called Chimera.
Chimera is a biological weapon developed by biogenetics scientist Dr. Vladimir Nekhorvich while working for Biocyte Pharmaceuticals. The company secretly wants to profit from the disease and its cure. Chimera has an approximately 20-hour dormant period after infection, creating the film’s central race against time.
The virus is paired with Bellerophon, the treatment that can neutralize it during that window. Rogue IMF agent Sean Ambrose steals the cure and tries to use Chimera to manipulate Biocyte’s stock value and gain control of the company. Ethan Hunt is sent to recover both the virus and the antidote, while recruiting Nyah Nordoff-Hall, Ambrose’s former partner.
The title Chimera refers to a hybrid creature from Greek mythology, a fitting name for a fabricated and deadly biological threat. Bellerophon is not the virus: it is the cure. Anthrax and Ebola are real diseases, but they are not the fictional pathogen in this film. The movie was released in 2000 and directed by John Woo.