In The X-Files, S2E7 (the episode titled '3'), Mulder and Scully investigate a group of vampires. In the episode, Mulder is offered to drink one of the vampire's blood:
KRISTEN: All day long I deal with equity notes, bonds, nothing that’s real. This gives my life… life. (she pricks her finger and offers the bloody tip to MULDER) My name’s Kristen. It’s a normal name.
MULDER: (pulling her hand away from his mouth) AIDS. Aren’t you afraid?
KRISTEN: I wish I could die.
My question is are vampires concerned or affected by blood-borne disease in The X-Files?