Park Ji-Sang [Blood]

He's the principal vampire character of the south-korean drama BLOOD. It's a little bit complicated, but he's infected by a virus since he was born, because his parents were infected by it. And his mission is to discovered the vaccine to stop it. So, he works in a hospital in Seoul with the doctor Yoo Ri-Ta, but she doesn't know that he's a vampire. ;D I recommend you this serie and I hope a second season will come soon !