Right. That. [She'd known it was likely to come up, and it's not as if this is the first time that she's told someone around here about it; Strange knows, and after the last mission, so does Izunia. Still.] It's the presymptomatic stage of acquired obligate hemophagy. As long as I'm careful about my health it should stay asymptomatic and noninfectious indefinitely, although I don't believe the virus would be able to jump the species barrier in any case. It's not seen in even closely related non-troll species.