Vampires are creatures of the night who are bound by the moon, forever wandering the earth never to experience the warmth of the sun or risk a very painful and agonizing death in the light. They feed on human blood to survive, a vampire can not live off of animal blood and those who choose not to feed can not die but will wither away in a process of mummification in which they are basically just living statues, unable to move or speak. Vampires have heightened senses, a form of mind control called Suggestion, as well as an unnatural healing ability that makes them quite durable against damage. Garlic, crosses, and holy water have no effect on them although wolvesbane has been known to ward off their Suggestions powers. They can eat regular food however their body tends to reject it as the food does not give the vampire any nutrition. They do not have to sleep in coffins and silver and fire is quite deadly to them.
The cured, are essentially, humans who were once vampires. They're ordinary humans, with none of their former powers of strength, speed, healing, mind control, and ect. Just as it takes a day or two for a human to turn in a vampire, a vampire who has taken the cure will turn back into a human in the same amount of time. The cured are not able to be turned a second time so being human is a permanent effect. Vampires who feed on a person who has received the cure will be turned into humans themselves. Just as it is hard figuring out who is a vampire, figuring out who has taken the cure is like playing a game of needle in the hay stack. They look and smell like ordinary everyday humans and it is for this exact reason that vampire radicals want those who have been cured dead and the cure destroyed as it threatens the very existence of those who wish to stay as vampires.
Familiars are humans who are employed by vampires to do jobs or run errands for their vampire bosses during the day. They're treated more or less like slaves but they get paid quite a lot of money so it might actually be worth the trouble. There is no limit to how many familiars a vampire could have under his or her employment at one time. In fact, the more you have the greater your status is. Familiars can take on whatever job a vampire hires them for, either to act as bodyguards or just as an entourage to keep things entertaining.
Donors are humans who, like familiars, serve vampires though usually it's without being paid to do so. They might as well be slaves for the way they are treated or called cows to be more accurate. There are many ways to persuade a human into being a vampire's donor, Suggestion being the most common method, while blackmailing, striking fear, and bribing people fall closely behind. Some people don't even need to be coerced into becoming a donor and will give their blood willingly, as if done right being bitten can be a very pleasurable experience, almost like having sex, for both the human and the vampire.
And last but least, we have humans who are well...human. They have no unnatural abilities about them and while they all know vampires exist, they choose to ignore them completely or just try to stay out of their way. Others, fully aware of the potential damage the vampires could do become hunters who specialize in killing vampires. Ever since they made their presence known, the government has put bounties on any rogue vampires causing trouble for the city which has put a rise on the number of hunters over the past five years.