Board Thread:General Discussion/@comment-108.217.94.142-20170224040857

If Becca created night blood within a lab around 100 years prior to the present in which the show takes place, how come there are generations of people being born with nigthblood? Like if Becca CREATED the blood and its not a part of anyone's actual DNA what so ever, how are kids being born with it? Please help I've always wondered this. 