Do you really need to say "huh" after every other sentence?

You seem unable to separate "drinking blood" from "killing." They don't need to drain us, and they don't even need to drink from our veins. I've been donating by having my blood drawn by a doctor at the Infirmary. It's safe, sterile, and keeps a portion of our population from needlessly starving.

No, but it means the vampiric inmates are clearly redeemable as-is, if others of their race are wardens. It also renders your assertion that they're monsters false.