The rabies virus is a deadly infectious agent that primarily affects mammals. It causes acute encephalitis, which is a severe inflammation of the brain leading to neurological symptoms and eventually death. The virus is also sometimes referred to by its scientific name, Lyssavirus. Other common synonyms for the rabies virus include hydrophobia virus, furious virus, and dumb rabies virus. The virus is primarily transmitted through the saliva of an infected animal, usually through a bite. It is important to seek medical attention immediately if you have been bitten or exposed to an infected animal, as early treatment can prevent the onset of symptoms.