In specifics, how fast, how painful, and in what order would the human body be infected, specifically from being bitten on the neck. I have found some information, but there are still pieces missing. please take care in answering with facts.(well, not facts, vampires supposedly don't exist.)
Depends on the setting. Culturally vampires will find their roots in religious beliefs and so in the oldest stories such as Dracula it’s ultimately falls to God vs Satan and that impacts on how Dracula is portrayed and behaves. In more contemporary works vampirism is often described as an actual disease of sorts, like in Elder Scrolls or Blade I where a vampire describes it to Blade as a sort of cancer.
It depends on what types of vampire you speak of are the vampires alive like in the show Supernatural or or they the classic undead vampires. Acording to Supernatural even after bit and infected you do not FULLY turn into a vampire until you drink your first blood Acording to the Skyrim wiki and I quote "If the disease has not been cured (via a Cure Disease potion or praying at a shrine) within three days, the infection mutates into full vampirism, causing a series of maladaptive and beneficial traits to emerge in the subject. Drinking blood can stay the infection and lessen the deficits of the disease." In most the show Supernatural it's almost instantly. According to MOST Popular stuff the subject is infected, gets sick and dies with in a day of infection upon there death they reanimate as a vampire. In Dungeons and dragons upon being bit you are turned into a vampire spawn, and the vampire who turned you must turn you into a true vampire. Hope that helps.