She reasons that she can be of use, since Van Helsing can hypnotize her. More importantly, she must go because if left on her own with no one to guard her, she must go to the Count if he summons her. The idea of the East is an interesting and complex theme that plays itself out in different ways throughout the novel. According to some interpretations, Stoker's novel has strong strains of xenophobia and imperialism the story, after all, can be read as the tale of a very bad immigrant. The vampires make an excellent metaphor for this process.
Every person killed by a vampire, under the right conditions, becomes a vampire.
It is easy to imagine normal humans quickly becoming outnumbered by the undead and this process parallels the xenophobe's paranoid fantasies about immigration and miscegenation. Dracula's xenophobia is also apparent in Stoker's depiction of gypsies. Significantly, the gypsies are Dracula's allies, although it is unclear if they know that the Count is a vampire at the start of the novel, or if they are transporting a vampire at the end of the novel. Gypsies were migrant peoples of Eastern European origin who traveled all throughout Europe. They were one of the most hated minority groups in England constantly defamed in both journalism and literature as dangerous criminals and savages, or merely as an uncivilized ethnic nuisance.