This question is interesting because it sheds light on one of the crucial features of Bram Stoker's Dracula, namely that, as Mary Shelley's Frankenstein, it is essentially a novel about science. Although the figure of Dracula and the notion of vampirism were taken from folk mythology, the main characters of the novel are Jonathan Harker, a logical, rational lawyer, and Dr. Van Helsing, a doctor and scientist. Both vampirism and its cures in the story act according to rigorously logical rules, despite the atmosphere of Gothic horror.
The first step in turning a human being into a vampire is that the vampire needs to bite the human three times separated by intervals of at least 24 hours and drink the human's blood; Dracula favors the neck as the location for the bites. The effect of this can be partially reversed by a transfusion of human blood. Next, the human must drink the vampire's blood. Finally, the human must die as a human and rise as a vampire.