the act of humans who have been infected with a complex, symbiotic virus that rewrites the genetic code of every nucleus in the body, resulting in countless alterations to their biological makeup. Changes in their brain chemistry and digestive system cause them to hunger for the blood of uninfected humans, and they will commit unspeakably violent acts to get it. They are also known for their enhanced physical capabilities, longevity and averse reaction to bright light and UV rays.
In 1616, Italian scientist Ludovico Fatinelli published his Treatise on Vampires, in which he speculated that vampirism was caused by a microscopic pathogen, as opposed to demonic possession and other such myths.
The source of vampirism is the human vampirism virus (HVV). Like rabies, HVV has a distinct bullet shape and belongs to the order Mononegavirales?viruses with a nonsegmented, negative-stranded RNA genome. The virus' natural host is a flea commonly found on cave-dwelling bats?most notably the vampire bat. In the most common scenario, the flea bites a bat, which in-turn passes the virus on to humans and other mammals.
While most viruses are highly specific in what tissues they target, HVV is able to infect every living cell in the body, with the exception of red blood cells (which are replaced over time by the infected bone marrow). It's also much less destructive, as it can effectively transform tissues without killing them.
In theory, HVV infection is possible through any exchange of bodily fluids; however, transmission occurs through the bite of an infected person or animal in virtually every case. Thankfully, the virus isn't airborne.
it is a diseases and its has three stages1 infection 2 coma 3 act