system
Given the following post, respond as if you're commenting on Reddit:
human
[VAMPIRES] How long could a vampire last in today's world?

How long could a vampire operate undetected and free in modern society assuming the vampire-

* Must feed on human blood at least once every two-four weeks.
* Possess vastly superior speed and strength to human being.
* Is killed by sunlight.
* Creates other vampires by leaving a bitten victim alive.
* Appears human for all intent and purposes except for two slightly larger, sharper, canine teeth.
* Lives in a world where people have never heard of vampires. (and for fun what about a world where where vampires are fiction like ours)
gpt
Male or female vampire?  Are they reasonably attractive?  Do they have any manner of income / wealth?  It's relatively easy to munchkin a way to have them survive indefinitely but it would require ignoring some basic urges a sapient being would have.  Going to a nightclub and going home with someone and drinking them dry would feed the blood urges.  Add in some going home with people and *not* drinking from them and all around being courteous to those on the feeding grounds to throw any investigations off your trail.  Never creating another vampire is important, because of the whole "three can keep a secret if two are dead" thing.  This is without going into the possibility of robbing blood banks and such.