As far as I remember there was one vampire mentioned in "Children of the Night", a knight who was embraced during the crusades and who had a really bad sunburn that now is with him for all eternity. And I would consider the flaw of having a wound you have to heal each and every night something in the same vein. So yes, I would rule that the period is as well something that stays with you untill your final death. Period (pun intended)....