legend

he glimpses a future society where infection is normal and he, neville, is a murderous biological deviant. as he turns away and swallows the pills, neville grasps the reversal that has taken place and that just as vampires were legend in pre-infection times now he, an obsolete exemplar of old humanity, is legend in the eyes of the new race born of the infection. the sheer ridiculousness of it all causes neville to chuckle as he dies, his last thoughts being "[i am] a new superstition entering the unassailable fortress of forever. i am legend."
- wiki

sorry if i spoilt it for you, but i am going to buy the book even though i've read it all on wiki.