It turns out Nomak is Nyssa's brother, the Reapers are a new breed of vampires (not a new virus), Scud doublecrosses Blade (he is working for Nyssa's father). Nomak kills Nyssa's father. Blade kills Reinhart and Nomak; Scud, of course, pays for his treachery. Nyssa is mortally wounded and dies watching her first sunrise.
Other mistake: Towards the end of the film, after Snipes beats the crap out of a lot of vampires, Whistler throws Blade's sunglasses to him. They show him throw them in one shot, then in the next shot they show Snipes catching them. But look in the background at Whistler, he doesn't have the glasses, but is moving his arm like he is throwing them. The glasses must have been computer animated, and bad editing contributed to this mistake. (01:37:34)