I can always request additional samples later at the price of sharing something like this. [His shoulder rolls back to the microscope. Is he bringing doctors with nerd power? He sure is. Alucard's pretty sure it's the least compromising thing he's ever done for this job.]

Hm.

[Alucard's eyes go back to the blood samples, thoughtful.]

If the geographic factor is true for all of these patients, then in theory it's true for the vampires that live in the area as well. I'd like to know how many vampire territories these individuals cross over. One or two wouldn't be strange, but if it could in theory be a different vampire per-person that's...an issue.