you took this off a doa? this isn't human blood. i don't know -- look at this blood smear -- the red blood cells are biconvex, which is theoretically impossible. they're hypochromic, there's virtually no hemoglobin in them. look at the pmns, they're binucleated, they should be mononucleated. curtis, it's three in the morning. i'm really not in the mood for one of your practical jokes. i thought you promised to give me some distance? five minutes, not a second more. and i don't want to hear a word about "us". you haven't started in on the internal organs? what? sometimes -- -- but then i remember what an ass-hole you were and i'm snapped back to reality. my shoulder -- dislocated -- what -- ? she draws back, instinctively knowing that she's just witnessed something she shouldn't have. she looks for an exit, sees another doorway. she makes for it -- i'm sorry, i -- who are you people? you're joking -- why did you help me? why? what happens then? so what do you use, then? a stake? and you honestly expect me to believe all this? i can't just leave. i have a life here, a career -- i can go to the police. i have blood samples back at the hospital. i can show them. that's ridiculous! no one's that powerful. so that's it? you guys just patch me up and send me on my way? i need the police. this is an emergency -- hello? my name is karen jansen, i was with curtis webb at mid-town hospital last night -- that's right, i witnessed the attack -- 115 aurora, apartment 3g. yes, i'll wait here. please hurry. get a grip on yourself, girl. who is it? yes, that was me, i'm karen jansen -- i know. listen -- do you have any idea what happened to curtis, the other doctor? why? he said it would work against vampires -- how did you know? you used me as bait?! but, he could've -- but he's a policeman -- why in god's name would anyone want to work for them? and that's a good thing? what are you doing?! you can't do this, he's human, it's murder. you were going to kill him. what was i supposed to do?! shut my eyes and pretend i didn't see what i saw? i remembered the address. i followed you -- look, if what you say is true, if there's a chance i could turn into one of them, then i've got no choice, do i? i have to work with you. i need to learn everything i can about them. it's the only way i'll be able to find a cure for myself. you don't know that. what are you looking at? graffiti -- i know this place -- it's a blood bank. no. what if you've made a mistake? you let him go -- an hour ago you were ready to kill a man for less, this one didn't even talk. how can you tell? so many of them -- i still can't believe they're real. like what? what is this place? isn't this all a little high-tech? i thought vampires were more into cobwebs and coffins. he moved. what are these? how did you find us?! you've been listening in the whole time? whistler! you're hurt -- what am i injecting you with? you're one of them, aren't you? why didn't you tell me the truth about him? what happens if he doesn't take the serum? no offense, whistler, but you're not exactly working with state of the art equipment here. you might have missed something. why do you hunt them? he killed them? how did you escape? and now you're using blade to exact your revenge? i'll take my chances. blade? it's dark in here. whistler told me about your mother. those aren't real memories. no one has that kind of recall. if you're not human, then why do you bleed like us? i've seen vampire blood, you don't have it running through your veins. blade -- i made a trip to the hospital last night, borrowed some equipment. this is sodium citrate. it's an anti-coagulant. we use it to treat blood-clots sometimes. vampire blood is thinner than humans, though. watch what happens when i introduce some into a sample -- before you go, i'd like to take a sample of your blood. is he sick? you care about him, don't you? my mother used to say that a cold heart is a dead heart. some. it's been slow -- i'm just tired, that's all. we've been up all night. excuse me. you make it sound like i'm already dead. all right, let's start with the basics -- why do vampires need to drink blood? then vampirism is a genetic defect, just like hemolytic anemia? so what about gene therapy? basically you'd have to re-write the victim's dna, alter it so that the dna will produce proteins capable of generating hemoglobin. with a retrovirus. it's injected into the bone marrow cells, it causes the host's dna to mutate. they've been using them to treat sickle-cell anemia. on me, yes. on blade, i'm not so sure -- the problem is, blade didn't contract the vampire virus from a bite like i did. he was born with it. the irony is, i could probably cure every vampire but him. what happened to the power? why haven't you killed me yet? how many of you are there? what happens then? lamagra -- you. there's no need for any of this. your condition can be treated. whistler and i were working on a cure when -- but you use blood banks -- you're a monster. sits nearby, watching him. from the steady rocking motion and the sounds of traffic outside, it's evident that they are in the back of a moving truck. are you all right? i don't know. i woke up just before you did -- is it bad? it won't work on you. your condition's congenital, the genetic mutations occurred in utero. all the other victims contracted vampirism after birth. i can't cure you, blade. i can cure myself, but i can't cure you. i'm so sorry. blade -- curtis?! blade. i'm not leaving without you. i know. take some of my blood. it's the only way. you know that. we'll never get out of here alive if you don't. yes you will. the human side of you is stronger. i know it is. don't stop -- my god -- are you -- all right? get away from him! blade! blade? i never imagined i'd be so happy to see the sun rise -- it's over, isn't it?