So in regard to humans being changed into vampires, I made a lot of headway on how I think it should go in this RP world.

The Process:
To transform a human, a vampire would have to drain them of enough blood to kill them. However, during the feed they would use a knife or other blade to open a wound on their own body (usually forearm) from which the human would drink as well. It could be thought of like a transfusion. When the human is completely drained, their body has to accept the vampire's blood as a replacement. However, it's not always guaranteed to work because the human's heart might reject the foreign blood, and they would die. In the meantime, the human would be comatose for a day or two while they either slowly recover as a vampire or pass away if the procedure fails. If it's successful, it would take about a week longer for fangs to come in and bloodlust to start accruing. Also, any physical ailments the human had would be healed.

The History:
It was discovered centuries ago that vampires could turn their human victims into one of their own kind through the aforementioned process. It used to be more common, especially when the vampires' population was still exceedingly small and new. Some clans were made up almost entirely of transformed humans. However, over time it became seen as unnecessary (especially when more clans started looking down on humans as inferior), and the process became taboo. Elder vampires stopped teaching it to the next generations, and the younger ones only heard vague tales of it in their history lessons. Now, the only way one could learn how to do it is by finding a written record of the actual process, since it's a lost art to most of the current living vampires.

For Vail, the thought of transforming Victoria into a vampire wouldn't have even crossed his mind because it's treated as an ancient practice, even though all natural-born vampires are still perfectly capable of doing it today. If she brought it up to him, that would spark his curiosity enough to search his family's library for a record of the procedure (they would have one). Then the two of them would have to decide if they thought it was worth risking her life, since there's a known margin of failure.

Let me know what you think and if you have any other questions/suggestions ^^