Most Helpful Girl
They're already dead though so I'm not sure how it would affect them? In the same way that alcohol doesn't affect them?1
Most Helpful Guy
There are of course many types of vampires.
Depending on the kind you speak of, it may harm them, but likely not. As they are undead, a disease is flesh eating in nature, the disease could not survive within a vampire.
Now if you're talking about a real life vampire, leaches, bats, and so forth the digestive process (as I understand it) takes care of all that. Again with no ill effects to the imbiber.3