At one time, the Vampires were normal people who were infected by a bacteria (later dubbed Vampiris, by Matheson). Unlike Neville, they had no immunity to the virus and subsequently became creatures previously known only in legend as vampires. Ben Cortman is one such vampire.
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The Last Man on EarthEdit
The infected are vampires as in the novel. It is the only film adaptation to do so.
The Omega ManEdit
I Am Legend (film)Edit
See full article: Darkseekers
In the 2007 film, the infected are called "Darkseekers", they are nocturnal and burned by sunlight, but are more akin to the modern depiction of zombies than vampires. Unlike previous versions the are very animistic and unable to speak.