While Dracula has wreaked destruction in Transylvania for hundreds of years, his move to England makes him a major threat to the foundations of the protagonists' own society. The protagonists seek not only to remove this threat to their safety, but to rid the world of Dracula's evil forever.
Dracula's means of reproduction is inherently a sexual act. To turn Lucy into a vampire, there has to be a blood exchange between both of them. Dracula is a perverse and multiple figure because he transforms pure and virginal women into seductresses, produces sexuality through their willing bodies.